High Discharge Rates Research Articles

Improvement in Cycle Characteristics using PVP Based Direct Carbon Coating During High-Rate Charge and Discharge of Li[Ni0.93Co0.07]O2 Nanofibers: Application for Lithium Secondary Batteries

<p>In this study, carbon-coated porous nanofibers were prepared via electrospinning and the performance of Li[Ni<sub>0.93</sub>Co<sub>0.07</sub>]O<sub>2</sub> (NC) synthesized by electrospinning (E-NC) and co-precipitation (C-NC) was compared. E-NC had a discharge capacity of 206 mAh g<sup>−1</sup> at 0.1C (17 mA/g), which is 10% higher than that of C-NC (189.2 mAh g<sup>−1</sup>). E-NC shows a high-rate performance of 118.32 mAh g<sup>−1</sup> (61.7%) at 5C (850 mA/g), which is 50% higher than that of C-NC (78.22 mAh g<sup>−1</sup> = 45.7%). Charge transfer of the carbon-coated porous nanofiber E-NC decreased by 35% compared to C-NC after 20 cycles as observed using electrochemical impedance spectroscopy. The results of this study show that the nanofiber structure with carbon coating shortens the Li-ion diffusion path, improves electrical conductivity, resulting in excellent rate performance.</p>

Understanding the effects of the electrochemical and thermal properties of the separator on the battery temperature

Through a combination of modeling and experiments, a detailed understanding of the role of the thermal properties and the electrochemical characteristics of the separators on the evolution of battery temperature during low, moderate and high discharge rates is developed. A microstructure-based heat-transfer model is formulated to predict the thermal conductivity of the separators under dry, wet and coated conditions. A 3D coupled electrochemical-thermal model of the battery is also developed and validated to elucidate the effects of the intrinsic properties of the separators such as thermal conductivity, and ionic conductivity, and extrinsic properties such as battery discharge rate and cooling efficiency of the environment on the battery temperature. It is found that the Al2O3-polyacrylic acid (PAA) coated separator mitigates the temperature increase in a Li-ion battery by 20% compared to the uncoated PE separator during high rates of discharge. The electrochemical properties of the separator such as ionic conductivity and diffusivity are enhanced by the PAA binder in the coating while the thermal conductivity of the separator is increased by the Al2O3 component in the coating. The enhancement in the electrochemical properties of the separator which reduces the ohmic losses within the separator-electrolyte domain plays a dominant role in moderating the battery temperature while the thermal conductivity enhancement of the separator due to the Al2O3-PAA coating plays a secondary role in determining the battery temperature. Compared to a battery with an uncoated separator, the effect of the coated separator in reducing the temperature increase in the battery is most pronounced when the battery is discharged at the highest rate and the ambient surroundings have the lowest cooling efficiency.

Bidirectional heat transfer characteristics of cavity cold plate battery thermal management system: An experimental study

Recently, electric vehicles have developed rapidly because of energy shortage and environmental crisis. Due to different working regions, there is a need for thermal compensation and thermal dissipation of power lithium-ion batteries for electric vehicles. Therefore, a cold plate thermal management scheme that can achieve normal working of lithium-ion battery under extreme high and low ambient temperatures is studied to solve the problem that battery cooling and heating systems are separated. First, two dummy batteries are built based on the experimental data of battery cell heat generation. And cold plate heat management experimental system is built. Then, the effects of a new cold plate with simple structure on the temperature of battery thermal dissipation and thermal compensation are studied by experiment. And the bidirectional heat transfer rules of the cold plate heat management system under extreme ambient temperatures are analyzed. The results show that the cold plate can significantly inhibit temperature rise of battery at high discharge rate, and that the safety of battery pack at higher ambient temperatures is enhanced. When coolant temperature is 45 °C, thermal compensation effects of the cold plate system are optimal. The maximum temperature difference of battery increases with the decrease of ambient temperature in thermal compensation experiment. When ambient temperature is −30 °C, the time to reach 20 °C is 411 s. And the maximum temperature difference at the last moment is 5.2 °C. When ambient temperature is greater than −25 °C, the maximum temperature difference at the last moment is lower than 5 °C. This research has great significance in reducing the complexity of battery pack and improving the application scope of liquid cold plate BTMS.

Experimental Investigation on Single-Phase Immersion Cooling of a Lithium-Ion Pouch-Type Battery under Various Operating Conditions

The selection of a battery thermal management technique is important to overcoming safety and performance problems by maintaining the temperature of batteries within a desired range. In this study, a LiFePO4 (LFP) pouch-type battery having a capacity of 20 Ah was experimentally cooled with both air and liquid (immersion cooling) techniques. Distilled water was selected as the immersion fluid in the experiments, and the impact of discharge rate (1–4C), immersion ratio (50–100%), and coolant fluid inlet temperature (15–25 °C) on the battery temperature were investigated during the discharge period. The experiments revealed that maximum temperatures were reached at approximately 45 °C and 33 °C for air and distilled water cooling techniques, respectively, at the discharge rate of 4C. The average and maximum battery surface temperatures can be reduced by 28% and 25%, respectively, with the implementation of the liquid immersion technique at the discharge rate of 4C compared to the air technique. Moreover, the experiments demonstrated that the maximum temperature difference could be lowered to 4 °C by means of 100% liquid immersion cooling at the highest discharge rate, where they are approximately 11 °C and 12 °C for air and 50% for immersion cooling, respectively. In addition, it was observed that the coolant fluid inlet temperature has a significant impact on battery temperature for %100 liquid immersion.

Concentrated Nonaqueous Polyelectrolyte Solutions: High Na-Ion Transference Number and Surface-Tethered Polyanion Layer for Sodium-Metal Batteries.

Na metal is a promising anode material for the preparation of next-generation high-energy-density sodium-ion batteries; however, the high reactivity of Na metal severely limits the choice of electrolyte. In addition, rapid charge-discharge battery systems require electrolytes with high Na-ion transport properties. Herein, we demonstrate a stable and high-rate sodium-metal battery enabled by a nonaqueous polyelectrolyte solution composed of a weakly coordinating polyanion-type Na salt, poly[(4-styrenesulfonyl)-(trifluoromethanesulfonyl)imide] (poly(NaSTFSI)) copolymerized with butyl acrylate, in a propylene carbonate solution. It was found that this concentrated polyelectrolyte solution exhibited a remarkably high Na-ion transference number (tNaPP = 0.9) and a high ionic conductivity (σ = 1.1 mS cm-1) at 60 °C. Furthermore, the surface of the Na electrode was modified with polyanion chains anchored via the partial decomposition of the electrolyte. The surface-tethered polyanion layer effectively suppressed the subsequent decomposition of the electrolyte, thereby enabling stable Na deposition/dissolution cycling. Finally, an assembled sodium-metal battery with a Na0.44MnO2 cathode demonstrated an outstanding charge/discharge reversibility (Coulombic efficiency >99.8%) over 200 cycles while also exhibiting a high discharge rate (i.e., 45% capacity retention at 10 mA cm-2).

Multiphase flow behavior of diesel in bog, fen, and swamp peats

Hydrocarbon fate and transport in various categories of peatlands is complicated by the botanical origin, and thus variations in the hydraulic structures and surface chemistry of its peat soils. There has been no systematic evaluation of the role of different peat types on hydrocarbon migration. Thus, two-phase, and three-phase flow experiments were performed for living and partially decomposed peat cores from bog, fen, and swamp peatlands. Numerical simulations of water drainage were performed using HYDRUS-1D, diesel-water and diesel-water-air flow using MATLAB Reservoir Simulation Toolbox (MRST). Five water table (WT) fluctuations were imposed to explore its potential to reduce residual diesel saturation in peat columns. Our results demonstrate a good match of the relative water permeability (krw) – saturation (S) relations estimated using the unsaturated hydraulic conductivity-S relation derived from HYDRUS-1D modeling of two-phase flow, and krw – S from MRST for three-phase flow, for all tested peat columns. Thus, we recommended using two-phase system based krw – S predictions if multiphase data are unavailable for peatland sites' spill management plans. We found the discharge of water and diesel both increase with increasing hydraulic conductivity, while residual water and diesel were within the range of 0.42–0.52 and of 0.04–0.11, respectively. High diesel discharge rates suggest that quick spill-response is required to manage its spread in peatlands. Up to 29% of residual diesel saturation was yielded by the five WT fluctuations, and thus we strongly recommend WT manipulation as a first step towards diesel decontamination progression in peatlands.

Experimental study on novel composite phase change materials with room-temperature flexibility and high-temperature shape stability in a battery thermal management system

Phase change materials have potential uses in battery thermal management because of their controllable phase change temperature and high latent heat. However, the application of phase change materials is limited by their strong rigidity, difficult assembly, high contact thermal resistance, low thermal conductivity, and leakage. In this study, a novel flexible composite phase change material (CPCM) with good mechanical properties is prepared, which can maintain flexibility at room temperature and shape stability at high temperatures. A thermoplastic styrene-based polymer (TPS) is used as the support material, paraffin is used as the phase change material, and expanded graphite is used as the reinforced thermal conductive filler. Results show that the composites have good flexibility and extensibility at room temperature and can maintain good shape stability at 60 °C and certain pressure. The contact thermal resistance of CPCM is 50% of the contact thermal resistance of similar materials. Thermal management experiments of single battery and square battery modules are designed. After six cycles of 2.5C high-rate discharge, the maximum temperature of the battery module cooled by CPCM is 2 °C and 10.4 °C lower than that of forced air cooling and natural air cooling, respectively. The temperature difference of the battery module is lower than 4.0 °C. This study shows that the new flexible CPCM thermal management system is easy to assemble and can reduce the temperature of battery modules, and this feature is conducive to the application of CPCM.

Characteristics of electrochemical hydrogen storage of TiFe based alloys with Ni composite by mechanical milling

In this paper, Ti1.04Zr0.1La0.06Fe0.6Ni0.3Mn0.2 + x wt% Ni (x = 0, 2, 5, 7, 10) composite were prepared by ball milling for 1 h, and the effects of Ni powder addition on the structure, morphology and electrochemical properties of the alloy were investigated. As the results show that after ball milling for 1 h with Ni powder, the composite consists of TiFe, ZrMn2, and Ni triple phases. With increasing of Ni powder addition, the uniformity of Ni powder coating on the alloy surface is improved, and the discharge capacity, cycling stability and high-rate discharge (HRD) performance of the composite are significantly improved. The first discharge capacity of the x = 10% alloy was as high as 286.9 mAh/g, and the retention rate reaches 77.8% after 50 cycles, which is nearly 90% higher than that of the alloy with x = 0% alloy (38.7%). At a current density of 80 mA/g, the HRD value of the x = 10% alloy (59.4%) was improved by 97.8% compared to that of the non-Ni powder ball milling alloy (30.03%), and the kinetic parameters (D, IL and Rct) showed a trend consistent with the pattern of variation of high-rate discharge performance. The uniform coating of Ni powder with high electrical conductivity and excellent electrocatalytic activity on the alloy surface is a primary factor for the enhanced electrochemical properties of Ni composite.

An Enhanced Thermal Model With Virtual Resistance Technique for Pouch Batteries at Low Temperature and High Current Rates

In this article, an enhanced thermal model is proposed for pouch batteries, which can be used for a battery management system (BMS) at low temperatures and high current rates. This thermal model integrates a virtual resistance model (VRM) and post resistance model at low temperatures. First, based on the Arrhenius equation, the resistance model at low temperatures (from 0 °C to −10 °C) and high discharge rates (from 3.125C to 12.5C) is extrapolated from the resistance model under room temperature conditions. In this context, the resistance model at low temperatures is regarded as the VRM. In comparison to the experimental results, the maximum error of this VRM is 0.851 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{m}\Omega $ </tex-math></inline-formula> . In addition, the equivalent post resistance model of the pouch battery, including that of the positive electrode and negative electrode, is also given for low temperatures. Finally, the complete thermal model for pouch batteries is validated at low temperatures and high discharge rates. The temperature evolution at different points on the battery, along with the heat-generation properties of the battery, is simulated under cyclic pulse current and constant current working conditions. For cyclic pulse current, the maximum mean error in terms of temperature evolution is 0.72 °C, and for constant current working conditions, the maximum mean error is 0.79 °C.

“IMPACT ON CLINICAL OUTCOME AND TOTAL HOSPITAL STAY DURATION OF VACCINATED RTPCR POSITIVE PATIENTS ATTENDING TERTIARY CARE CENTRE”

Back ground: India responded swiftly to the global pandemic - COVID 19 , by starting administration of vaccines to its people from January 2021.At end of an year after starting vaccine drive, there was a need of ground reality assessment to check its impact on people. Aims &amp; Objective: The aim is to study the impact on clinical outcome and hospital stay duration of the COVID 19 vaccine status among RTPCR positive patients attending tertiary care centre. The objectives are to estimate mean hospital stay duration and number of death and discharges among RTPCR postive unvaccinated, partially and fully vaccinated patients. Materials And Methods: A total of 57 patients were included in study and at admission level, they were grouped into A, B, C as unvaccinated, partially vaccinated, fully vaccinated respectively. They were followed throughout their disease course and clinical outcomes were measured as either death or discharge and number of days of hospital stay. The clinical outcomes were compared in each group and checked for any statistical signicance. Results: The mean hospital duration in days are 8,7,5 and discharges are 3,7,33 and deaths are 6,7,1 in group A,B,C respectively (p&lt;0.05). Conclusion: Thus vaccinated have lower hospital stay duration , lower death rates and higher discharge rates than partially vaccinated than unvaccinated ones.

The influence of conditions in Lake Superior and the Bois Brule River, Wisconsin on returns of migratory rainbow trout

Rainbow trout were introduced to Lake Superior in the late 1800’s and exhibit a potamodromous life history and exhibit high variability in reproductive success. We examined reproductive variability in the Bois Brule River, WI (Lake Superior), through analyses of returns of wild first spawning (hereafter “maiden” returning) adults. We used classification and regression tree analyses to identify in-stream and in-lake (western Lake Superior) sources of variability and to identify the environment (stream or lake) that was most influential to the returns to each location. Among in-stream influences, high discharge rates in the spring period (March – May) during a pre-smolt’s first stream year were the strongest source of variability and were negatively correlated with returns. High discharge during the fall period from September to November in the pre-smolt first stream year was also negatively correlated with numbers of maiden returning steelhead from that year class. When variables associated with Lake Superior were considered, maiden returns were positively correlated with higher lake surface temperatures in Lake Superior. Returns were negatively correlated with the abundance of adult rainbow smelt and bloater suggesting a possible competitive interaction among those species. Finally, we also observed a conditional (minor) positive effect of age-0 smelt abundance indicating the importance of this prey for juveniles in colder years in western Lake Superior. Taken together, our findings indicate that both streamand lake conditionsin their first lake year are important sources of variability and point to spates in the spring and fall as initialcontrolling variables.

Investigation on the Thermal Contact Resistance Mechanism of a Composite Phase Change Material for Battery Thermal Management

Composite phase change materials as passive thermal management systems have great potential application in power battery modules, but they are still limited by some drawbacks such as easy leakage, high rigidity, and low thermal conductivity. In this study, an excellent antileakage flexible composite phase change material has been prepared and utilized in the battery module. Styrene–butadiene–styrene and ethylene vinyl acetate with a synergistic effect are utilized to improve the antileakage and flexibility properties, which are beneficial to improve the thermal management effect of the battery module. Particularly, the mechanism of thermal contact resistance between the phase change material and battery module is deeply analyzed; the experimental results revealed that the maximum temperature and temperature difference can be maintained within 46.5 and 3.5 °C at 3C discharge rate, respectively. It indicates that the antileakage flexible CPCM can not only form a closer contact with the batteries but also exhibit excellent temperature controlling capacity, especially at a high discharge rate. This study can provide new insights into the decrease of the thermal contact resistance in the battery module; it will be suitable for other dynamic equipment such as energy storage power stations and firefighting power systems.

Experimental and simulative investigation on battery thermal management system with structural optimization of composite phase change material

For improving the thermal performance of the power battery module in multiple operating condition at different discharge rate, composite phase change material (CPCM) with structure optimizations have been successfully prepared and assembled into battery module, which are comprehensively designed to fulfill the energy utilization for electric vehicles. Compared with the various structures of cooling system, the battery module with all sides CPCM structure is an effective and feasible approach, which can obtain with a relatively long operation time and suitable temperature. The experimental and simulative results shown that the temperature distributions of battery module were influenced by assembling structures at different discharge rate, especially at high discharge rate. The maximum temperature of battery module with all side CPCM can be controlled below 47.5 °C, and the temperature difference was maintained within 1.1 °C. Compared with that, the battery module with other structure CPCM were obviously higher than 48 °C at high discharge rate. Besides, the cycling performance revealed that the maximum temperature can be effectively controlled with all sides CPCM structure. This study reveals that the battery module with CPCM can exhibit outstanding thermal management effect and provide insights into relevant energy storage fields.

A novel strategy of thermal management system for battery energy storage system based on supercritical CO[formula omitted

Supercritical CO2 (sCO2) is examined as a working fluid for the first time in a unique thermal management strategy that aims to control undesirable thermal behavior in battery cooling applications. In the pseudocritical region, sCO2 has a high volumetric thermal capacity with low critical pressure and temperature, which not only reduces system complexity and costs but also eliminates the possibility of two-phase critical heat flux and flow instabilities. A pack of 20×5 Li-ion batteries for battery energy storage system (BESS) applications was designed and employed in a structurally optimized thermal management system. Further, the effects of different dielectric fluid media on the number of flow inlets, flow rates, and discharge rates were numerically investigated. Compared with conventional coolants, sCO2 exhibited superior temperature suppression and temperature differences. The rise in both mass flow rate and the number of flow inlets significantly suppressed the maximum temperature and temperature difference. Besides, the pressure drop was slightly increased with the increased mass flow rate. Moreover, sCO2 controls the thermal behavior of a large battery pack at high discharge rates within an optimal range. The finding offers various attributes for cooling large battery packs, particularly for high-power grid stations and BESS. In the future, the practicality of high working pressures and power requirements for the pump should be carefully studied.

Concurrent analysis of hospital stay durations and mortality of emerging severe acute respiratory coronavirus virus 2 (SARS-CoV-2) variants using real-time electronic health record data at a large German university hospital.

Multistate methodology proves effective in analyzing hospitalized coronavirus disease 2019 (COVID-19) patients with emerging variants in real time. An analysis of 2,548 admissions in Freiburg, Germany, showed reduced severity over time in terms of shorter hospital stays and higher discharge rates when comparing more recent phases with earlier phases of the pandemic.

Increasing the charge/discharge rate for phase-change materials by forming hybrid composite paraffin/ash for an effective thermal energy storage system

&lt;abstract&gt; &lt;p&gt;Low-temperature latent heat storage (LHS) systems are suitable for incorporating paraffin as the storage material. However, they face difficulty in actual implementation due to low thermal conductivity (TC). The present study used volcanic ash as an environmentally friendly and cost-effective material to increase the TC of paraffin. Three composites of paraffin/ash were prepared with ash proportions of 10 wt%, 30 wt% and 50 wt%. Characterizations were done to evaluate the average TC and properties. Thermal performance evaluation was conducted by analyzing the static charge/discharge cycle. The average TC for paraffin was 0.214 W/m·K. Adding volcanic ash improved the TC to 19.598 W/m·K. It made the charge/discharge performance of the composite better than that of pure paraffin. The charge rate for the composite ranged from 3.83 ℃/min to 5.12 ℃/min. The highest discharge rate was obtained at 4.21 ℃/min for the composite paraffin&lt;sub&gt;50&lt;/sub&gt;/ash&lt;sub&gt;50&lt;/sub&gt;. The freezing temperature for the composite is influenced by the ash proportion, which can be taken as a suitable approach to adjust the freezing point of paraffin-based thermal energy storage (TES). The detailed results for the characterization and thermal performance evaluation are described thoroughly within the article. The overall result indicates that volcanic ash is applicable for improving the TC and charge/discharge rate of paraffin-based TES.&lt;/p&gt; &lt;/abstract&gt;

"I know my body better than anyone else": a qualitative study of perspectives of people with lived experience on antimicrobial treatment decisions for injection drug use-associated infections.

People who inject drugs (PWID) are at risk for severe bacterial and fungal infections including skin and soft tissue infections, endocarditis, and osteomyelitis. PWID have high rates of self-directed discharge and are often not offered outpatient antimicrobial therapies, despite studies showing their efficacy and safety in PWID. This study fills a gap in knowledge of patient and community partner perspectives on treatment and discharge decision making for injection drug use (IDU)-associated infections. We conducted semi-structured interviews with patients (n = 10) hospitalized with IDU-associated infections and community partners (n = 6) in the Portland, Maine region. Community partners include peer support workers at syringe services programs (SSPs) and outreach specialists working with PWID. We transcribed and thematically analyzed interviews to explore perspectives on three domains: perspectives on long-term hospitalization, outpatient treatment options, and patient involvement in decision making. Participants noted that stigma and inadequate pain management created poor hospitalization experiences that contributed to self-directed discharge. On the other hand, patients reported hospitalization provided opportunities to connect to substance use disorder (SUD) treatment and protect them from outside substance use triggers. Many patients expressed interest in outpatient antimicrobial treatment options conditional upon perceived efficacy of the treatment, perceived ability to complete treatment, and available resources and social support. Finally, both patients and community partners emphasized the importance of autonomy and inclusion in medical decision making. Although some participants acknowledged their SUD, withdrawal symptoms, or undertreated pain might interfere with decision making, they felt these medical conditions were not justification for health care professionals withholding treatment options. They recommended open communication to build trust and reduce harms. Patients with IDU-associated infections desire autonomy, respect, and patient-centered care from healthcare workers, and may self-discharge when needs or preferences are not met. Involving patients in treatment decisions and offering outpatient antimicrobial options may result in better outcomes. However, patient involvement in decision making may be complicated by many contextual factors unique to each patient, suggesting a need for shared decision making to meet the needs of hospitalized patients with IDU-associated infections.

Enabling high-rate discharge capability and stable cycling for Ni-rich layered cathodes via multi-functional modification strategy

Nickel-rich layered cathodes have received extensive attention because of their relatively high energy density. However, the poor rate performance and inadequate cycling stability severely hinder its large-scale applications. Herein, a multi-functional modification strategy combining dual-site Mg/Nb co-doping with in-situ derived LiNbO3 coating layer is proposed. Mg2+ doped as pillar ions at Li sites can reduce the disorder of Li+/Ni2+, while Nb5+ doped at transition metal sites can improve structural stability due to its stronger Nb-O binding energy. Moreover, LiNbO3 ionically conductive nano-scale coating layer can effectively improve interface properties of the material. Benefitting from the synergistic effect of multi-functional modification strategy, the LiNi0.83Co0.12Mn0.05O2 cathode material co-modified with 2 mol% Mg and 1.4 mol% Nb exhibits extraordinarily enhanced electrochemical performance, which can display an excellent capacity retention of 84.1% after 200 cycles at 1 C and a high specific capacity of 132.9 mAh g−1 at the ultra-high rate of 30 C. Furthermore, the multi-functional modification strategy can also effectively alleviate grain-level intergranular cracks and structural degradation during long-term cycling. These results demonstrate that simultaneously using two types of doping cations together with in situ derived coating layer is an efficient and feasible modification strategy for Ni-rich layered cathodes.

Experimental Study of Suppressing the Thermoacoustic Instabilities in a Rijke Tube Using Microsecond Discharge Plasma

Thermoacoustic instabilities occur when heat release is coupled with pressure fluctuation, which may cause performance degradation of the combustor and serious structural damage. This study focued on an active control method using discharge plasma and showed experimentally that discharge plasma can make a difference in controlling the thermoacoustic instabilities in a Rijke tube. A vertically placed Rijke tube thermoacoustic system using induction heating tungsten mesh as a heat source was built. The results show that the high repetition rate discharge can effectively suppress the thermoacoustic oscillations in the Rijke tube and that they will not re-occur for some time. Additionally, their effectiveness depended more on average power than energy per pulse. Combining the collected pressure, schlieren data, and theoretical analysis, it can be suggested that the plasma discharge could heat the inlet airflow, which could influence the heat exchange and then could break thermo-acoustic coupling, and its high-frequency pressure perturbation might increase the dissipation of the energy of sound.

Early Albumin Infusion Is Associated With Greater Survival to Discharge Among Patients With Sepsis/Septic Shock Who Develop Severe Acute Kidney Injury Among Patients With Sepsis/Septic Shock Who Develop Severe Acute Kidney Injury.

To examine the association between early use of albumin and time to discharge in adults who develop severe AKI while hospitalized with sepsis/septic shock. Retrospective cohort study using de-identified electronic health records from a national database (Cerner Health Facts; Cerner Corp., Kansas City, MO). Patients (n = 2,829) hospitalized between January 2013 and April 2018 with a diagnosis of sepsis/septic shock (identified using International Classification of Diseases, 9th Revision and 10th Revision codes) who developed severe AKI (stage 3 according to Kidney Disease Improving Global Outcomes criteria) during hospitalization (n = 2,845 unique encounters). Patients were grouped according to timing of albumin exposure: within less than or equal to 24 hours of admission ("early albumin") or unexposed/exposed late ("nonearly albumin"). A cause-specific hazard model, censoring for death/discharge to hospice, was used to examine the association between "early albumin" and the rate of hospital discharge with clinical stability. Albumin was administered early in 8.6% of cases. Cases with early albumin administration had a median time to discharge of 13.2 days compared with 17.0 in the nonearly group (Log-rank p < 0.0001). An adjusted analysis showed that the rate of hospital discharge with clinical stability increased by 83% in the early albumin group compared with the nonearly group (hazard ratio, 1.832; 95% CI, 1.564-2.146; p < 0.001 nonearly group. The use of albumin within 24 hours of hospital admission was associated with a shorter time to discharge and a higher rate of discharge with clinical stability, suggesting an improvement in healthcare resource utilization among patients with sepsis/septic shock who developed stage 3 AKI during hospitalization.