Cycling Retention Research Articles

Double Perovskite La2 MnNiO6 as a High-Performance Anode for Lithium-Ion Batteries.

Traditional lithium-ion batteries cannot meet the ever-increasing energy demands due to the unsatisfied graphite anode with sluggish electrochemical kinetics. Recently, the perovskite material family as anode attracts growing attention due to their advantages on specific capacity, rate capability, lifetime, and safety. Herein, a double perovskite La2 MnNiO6 synthesized by solid-state reaction method as a high-performance anode material for LIBs is reported. La2 MnNiO6 with an average operating potential of <0.8V versus Li+ /Li exhibits a good rate capability. Besides, the Li|La2 MnNiO6 cells perform long cycle life without decay after 1000 cycles at 1C and a high cycling retention of 93% is observed after 3000 cycles at 6C. It reveals that this material maintains stable perovskite structure with cycling. Theoretical calculations further demonstrate the high electronic conductivity, low diffusion energy barrier, and structural stability of the lithiated La2 MnNiO6 . This study highlights the double perovskite type material as a promising anode for next-generation batteries.

Solid Electrolyte Li&lt;sub&gt;1.4&lt;/sub&gt;Al&lt;sub&gt;0.4&lt;/sub&gt;Ti&lt;sub&gt;1.6&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;3&lt;/sub&gt; as for the Lithium-Rich Manganese-Based Cathode Material Coating Li&lt;sub&gt;1.2&lt;/sub&gt;Ni&lt;sub&gt;0.13&lt;/sub&gt;Co&lt;sub&gt;0.13&lt;/sub&gt;Mn&lt;sub&gt;0.54&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;

Li1.2Ni0.13Co0.13Mn0.54O2 (L2MO) material coated with Li1.3Al0.3Ti1.7(PO4)3(LATP) was synthesized by sol-gel method. The coating amount was 0%, 0.5%, 1%, 1.5%, 2%. It is found that LATP coating improves the cycle stability of the material. After 200 cycles at 0.6 C rate, the cycle retention rate of the uncoated sample is 72.7%, while the retention rate of sample with 1% coating amount reaches 85%. LATP coating improves the rate performance of the material. The sample with 1% coating amount has the best rate performance, and the discharge specific capacity is 71.5 mAh/g at 10 C rate, while the discharge specific capacity of the sample without coating is 60.1 mAh/g. LATP coating alleviates the side reaction between the material surface and the electrolyte. As a solid electrolyte, it promotes the transmission of Li+ and reduces the charge transfer impedance of the material. The thermal stability of these materials was tested by DSC. The results show that LATP coating could improve the thermal stability of the material in charged state.

MOF-derived flower-like ZnCo2O4/ZnO nanoarchitecture as a high-performance battery-type redox-active electrode material for hybrid supercapacitor applications

Implementing a facile and efficient strategy to fabricate the multi-component metal oxide nanocomposites as the high-efficient electroactive electrode materials have gathered the limelight for effective energy storage applications. However, the reasonable design and development of such materials is still a significant challenge to meet the energy storage capability. Herein, we report a bottom-up strategy to fabricate a flower-like ZnCo2O4/ZnO (ZCO/ZnO) nanoarchitecture via thermal decomposition of a metal-organic framework (MOF). The unique flower-like ZCO/ZnO nanoarchitecture provides a fruitful channel for rapid electron and ion transportation and offers abundant electroactive sites for the battery-type Faradaic charge storage process. Interestingly, the multi-component ZCO/ZnO electrode reveals a specific capacitance of (Csp) of 803 F g−1 at a specific current of 1 A g−1 as compared to its counterparts (ZCO and ZnO). Even at a high specific current of 20 A g−1, a superior Csp of 538 F g−1 can be achieved, signifying the high-rate performance of the ZCO/ZnO electrode. In addition, the hybrid supercapacitor of ZCO/ZnO//AC depicts the Csp of 161 F g−1 at a specific current of 1 A g−1. It delivers a high specific energy of 50.41 Wh kg−1 at a specific power of 710.49 W kg−1, with excellent cyclic retention of around 91.04% over 10,000 cycles. Hence, this strategy could enlighten a pathway to fabricate promising electrode materials for high-performance electrochemical energy devices.

Facile preparation of silicon/carbon composite with porous architecture for advanced lithium-ion battery anode

Silicon is a potential anode material for Li battery due to its high theoretical specific capacity (4200 mAh g−1). However, Si is hampered for practical application in Li-battery due to its enormous volume alternation causing instability. Herein, we demonstrated a novel carbon-coated porous structure (C@void/Si-G) synthesized by uniformly wrapping Si into pitch pyrolytic carbon shells and then in-situ removing the sodium chloride template can overcome the bottleneck. It is worth noting that our process for C@void/Si-G also offers a simple route for cost down and mass production of anode material. The C@void/Si-G anodes exhibit an excellent capacity of 1082.7 mAh g−1 at 0.2 C after 200 cycles. Furthermore, it holds a high capacity retention of 81.9 % after 500 cycles at 0.5 C. We found that C@void/Si-G composite only rises about 41% volumetric expansion during 500 operation cycles. This can effectively avoid direct contact between silicon and electrolyte to form a stable solid electrolyte interphase (SEI) film. Especially, practical application of the C@void/Si-G anode is demonstrated in a full cell pairing with LiNi0.3Co0.3Mn0.3O2 cathode. The full cell presents great cycle retention of 90.1 % at 0.2 C after 100 cycles and a high energy density (446 Wh kg−1).

Facile three-step strategy to design CdS@Bi2Se3 core-shell nanostructure: An efficient electrode for supercapacitor application

In this study, we utilized a successive ionic layer adsorption and reaction (SILAR) route to attach bismuth selenide (Bi2Se3) nanoparticles on one dimensional (1D) cadmium sulfide nanowires (CdS NWs) at ambient temperature (27 °C) to design CdS@Bi2Se3 core-shell nanostructure towards active electrode for supercapacitor application. To verify and explore the retrieved surface configuration, structural, elemental, compositional, and surface morphological investigations were performed. The designed CdS@Bi2Se3 core-shell nanostructure not only offers the tremendous number of active areas, but also a continuous and quick one directional electron transport channels, demonstrating noticeable electrochemical performance with specific capacitance of 198 F g−1 (aerial capacitance 59.5 mF/cm2) with 80% cyclic retention @ 2000 cycles. Superior electrochemical activity was enhanced through the mutualistic involvement of Na+ ion insertion/extraction via non-stoichiometric bismuth selenide, which was well supported through electrochemical impedance (EIS) studies.

Geometrical design of top-to-bottom magnesiophilicity-gradient host for reversible Mg-metal batteries

Magnesium-metal batteries (MMBs) are promising candidates for large-scale energy-storage systems owing to their high volumetric capacity, low cost, and high level of safety. However, the problems of dendritic Mg deposition and its poor adhesion to a substrate remain unresolved. Herein, we first propose a unique geometrical design of a top-to-bottom magnesiophilicity-gradient 3D host for reversible MMBs. By systematically stacking three mesh layers with different Mg affinities, the 3D-Mg affinity controlled architecture (3D-MACA) can be simply fabricated. The bottom layer was designed to contain numerous nanofibers decorated with magnesiophilic Au seeds, which effectively guided the bottom-oriented Mg nucleation. In addition, the electrically insulated top layer could minimize the undesirable top-plating of Mg. As a result, 3D-MACA showed the lowest nucleation overpotential and highest cycle retention among the potential candidates. For evidence of bottom-oriented growth, ex-situ observation analysis of 3D-MACA was performed, and the geometrical effect was further investigated and explained by the theoretical 3D simulation. The proposed strategy may provide insight for future studies aimed at solving the prevailing issues for MMBs; in addition, the unique design can be extended to other metal battery systems.

Lithium Trapping and Irreversible Atomic-Scale Structure Evolution during Delithiation of Silicon Oxides as Lithium-Ion Battery Anodes

Optimizing the oxygen content of silicon oxides used as anode materials for high-performance lithium-ion batteries is critical since it has diverse effects on lithium storage properties. However, the atomic-scale understanding of the effect of the oxygen content on structural evolution of the materials, particularly during delithiation is still limited. With this aim, we employ an iterative lithium extraction-relaxation algorithm based on reactive molecular dynamics simulations to investigate the dynamic processes of various silicon oxides. Our study highlights the effect of the oxygen content on various lithium storage properties, including the energetics of the interaction, lithium diffusion behaviors, lithium entrapment, structural reversibility during cycling, and mechanical properties. In particular, the simulations show that although increasing the oxygen content can significantly reduce the percentage of volume expansion during lithiation, which is a major cause of poor cycle retention of silicon- and silicon oxide-based anodes, this leads to an increased amount of the trapped lithium and an irreversible structural change during the reverse process. As contradictory conditions are required to achieve high specific capacity, long cycle life, and high coulombic efficiency, this atomistic study could provide a fundamental understanding beneficial for optimizing the oxygen content toward the development of silicon oxide-based anodes.

Ultrathin V6O13 nanosheets assembled into 3D micro/nano structured flower-like microspheres for high-performance cathode materials of Li-ion batteries

Benefiting from its unique high theoretical capacity and energy density, V6O13 is considered an outstanding cathode candidate. Nevertheless, the lithium ions will form LixV6O13 when embedded in V6O13, resulting in volume expansion and crystal structure instability. For that reason, the construction of three-dimensional nanostructures is an awfully serviceable method to resolve the above problems. Herein, we adopt a green and convenient hydrothermal method to synthesize three-dimensional microsphere structure composed of nanoflakes, and flower-like V6O13 microspheres are synthesized by adjusting the concentration of nitric acid (HNO3). Meanwhile, the formation mechanism of flower-like V6O13 microspheres is investigated by controlling the hydrothermal reaction time and the concentration of HNO3. As a lithium-ion cathode material, flower-like V6O13 microspheres show an initial discharge specific capacity of up to 368.1 mAh/g at a current density of 0.1 A/g. There was still a discharge specific capacity of up to 313.1 mAh/g after 50 charge/discharge cycles, with a capacity retention rate of 85.1%. The flower-like V6O13 microsphere electrode also combines an excellent rate performance with a satisfactory cycling stability, which achieves a cycle retention rate of 80.2% even after 200 charge/discharge cycles, and an initial discharge specific capacity of 216.9 mA/g even at a high current density of 1 A/g. The results show that, benefitting from its large specific surface area and robust three-dimensional structure, the flower-like V6O13 microsphere electrode material exhibits excellent cycling performance, and the lithium-ion batteries which use it as the cathode material perform equally well in terms of high capacity and high rate.

Sucrose-directed porous carbon interfaced α-Fe2O3-rGO for supercapacitors

Simultaneously embedding resonating 2D carbon into a metal oxide as a template and decorating in graphene layers offer a great strategy to enhance electronic properties in supercapacitor application. Brown sugar is abundant macromolecule with high content of sucrose and the application in supercapacitors would build diversification of brown sugar utilization. In this study, an interconnected network of iron oxide-mesoporous carbon hybrid (rGO/su-GC@Fe2O3) is synthesised through a microwave-assisted gel combustion using brown sugar as the carbon precursor to serve as Fe2O3 template, followed by wrapping the material within rGO nanosheets. Exploring the properties for supercapacitor, it delivered high specific capacitance of 1978F/g at 1 A/g and a cycling retention of 95.2% after consecutive 8000 cycles. The excellent performance hinges on the inimitable morphology with mesoporous channels marked with large surface area of 486 m2/g, high mesoporous percentage and the synergistic effect from resonating 2D graphitizable carbon, Fe2O3 and conductive rGO matrix. These results assert rGO/su-GC@Fe2O3 as productive promising supercapacitive electrode material for future utilization, meanwhile it could be applied in adsorption and electrocatalysis.

Realization of High Loading Density Lithium Polymer Batteries by Optimizing Lithium-Ion Transport and Electronic Conductivity.

Lithium polymer batteries (LPBs) with a high energy density and safety are being actively studied for their use as an energy storage system. However, bottlenecks to their development include charge-transport resistance and poor interfacial contact. In this paper, we introduce carbon nanofiber (CNF) as a conductive additive and the optimization of porosity in the electrode by calendering to realize a high loading density LPB. A simple dispersion strategy is applied to homogeneously disperse nanofiber additives in the electrode to achieve high electronic conductivity. Calendering with optimized pressing degree was performed on the CNF-based electrode to enhance lithium-ion transport and electron conduction in the LPB. The optimal pressing conditions were confirmed by measuring the electronic conductivity, internal resistance, lithium-ion diffusion coefficient, and charge transport characteristics of the cells. When the electrode was pressed by 35%, optimum electrode wettability by solid polymer electrolyte and contact between particles and current collector were achieved, resulting in the high performance of the LPB. Finally, at the optimized pressing degree, we successfully demonstrate 90% cycle retention during 100 cycles and an improvement of the volumetric energy density by over seven-fold.

Multiphase lattice Boltzmann modeling of cyclic water retention behavior in unsaturated sand based on X-ray computed tomography

The water retention curve (WRC) defines the relationship between matric suction and saturation and is a key function for determining the hydro-mechanical behavior of unsaturated soils. We investigate possible microscopic origins of the water retention behavior of granular soils using both computed tomography (CT) experiment and multiphase lattice Boltzmann Method (LBM). We conduct a CT experiment on Hamburg sand to obtain its WRC and then run LBM simulations based on the CT grain skeleton. The multiphase LBM simulations capture the hysteresis and pore-scale behaviors of WRC observed in the CT experiment. Using LBM, we observe that the spatial distribution and morphology of gas clusters varies between drainage and imbibition paths and is the underlying source of the hysteresis. During drainage, gas clusters congregate at the grain surface; the local suction increases when gas clusters enter through small pore openings and decreases when gas clusters enter through large pore openings. Whereas, during imbibition, gas clusters disperse in the liquid, the local suction decreases uniformly. Large pores empty first during drainage and small pores fill first during imbibition. The pore-based WRC shows that an increase in pore size causes a decrease in suction during drainage and imbibition, and an increase in hysteresis.

Mitigated lattice distortion and oxygen loss of Li-rich layered cathode materials through anion/cation regulation by Ti4+-substitution

Lithium-rich layered cathode material (LLM) can meet the requirement of power lithium-ion energy storage devices due to the great energy density. However, the de/intercalation of Li+ will cause the irreversible loss of lattice oxygen and trigger transition metal (TM) ions migrate to Li+ vacancies, resulting in capacity decay. Here we brought Ti4+ in substitution of TM ions in Li1.2Mn0.54Ni0.13Co0.13O2, which could stabilize structure and expand the layer spacing of LLM. Moreover, optimized Ti-substitution can regulate the anions and cations of LLM, enhance the interaction with lattice oxygen, increase Ni3+ and Co3+, and improve Mn4+ coordination, improving reversibility of oxygen redox activation, maintaining the stable framework and facilitating the Li+ diffusion. Furthermore, we found 5% Ti-substitution sample delivered a high discharge capacity of 244.2 mAh/g at 50 mA/g, an improved cycling stability to 87.3% after 100 cycles and enhanced rate performance. Thereby Ti-substitution gives a new pathway to achieve high reversible cycle retention for LLMs.

Failure Mechanisms of High-Voltage Spinel LiNi0.5Mn1.5O4 with Different Morphologies: Effect of Self-Regulation by Lithium Benzimidazole Salt Additive

High voltage (∼5 V) spinel LiNi0.5Mn1.5O4 (LNMO) has attracted great attention because of its ultrahigh voltage plateau, which can be used as a cathode to reduce pressure in battery management systems. Moreover, compared with layered LiNxMyCzO2 materials, LNMO only requires little amounts of Ni, is cobalt-free for maintaining energy density, is inexpensive, and is lightweight. This study demonstrates two types of primary particles with different morphologies: rectangular and pentahedral. The pentahedron-shaped LNMO has lower surface energy owing to the formation of high valence Ni on the surface, thereby causing gas evolution and a loss in cycle retention, a direct Ni2+/Ni4+ reaction. Conversely, rectangular-shaped LNMO with higher Mn3+ content exhibits a stable electrochemical reaction, which provides a higher surface energy that prevents ethylene carbonate (EC) decomposition on the surface, and thereby, excellent performance is obtained, a parallel reaction of Mn3+/ Mn4+ and Ni2+/ Ni3+. By adding a lithium salt additive, trifluoromethyl benzimidazole (LiTFB), a self-regulation of Ni and Mn ion valences leads to a key reaction on both pentahedral (surface disordering effect) and rectangular (preventing Jahn–Teller distortion effect) LNMO morphologies. The two-electron transfer in the reactions of Ni2+/3+ and Mn3+/4+ of LiTFB-modified LNMOs provides excellent electrochemical performance for further high-energy applications.

Synergistic effect from Ni2+ ions with SnS for all solid-state type symmetric supercapacitor

Ternary compounds have attracted the attention of many in the field of energy storage owing to the synergistic effect from the material. By fine-tuning the electron structure, extremely active electrode materials can be produced. Herein, we have endeavored to synthesize ternary nickel tin sulfide (NixSn1-XS) nanocomposite using a simple and cost-effective hydrothermal technique and fabricated the lightweight, large-area paper-based electrode on conductive Ag-coated cellulose paper to explore the supercapacitor application. The effect of doping Ni2+ is explored which shows the noteworthy improvement in the electrochemical activity of pristine SnS. The Ni0.05Sn0.95S nanocomposite shows the best synergistic effects including hierarchical architectures, large specific surface area, and excellent intrinsic conductivity. Owing to these excellent properties, Ni0.05Sn0.95S displays the significant improvement in capacitive performance as high specific capacitance of 310.08 F g−1 at current density of 0.4 A g−1 and longtime cycling (7000 cycles) stability with cycling retention of 94.9 %. Furthermore, the device-specific features of Ni0.05Sn0.95S were investigated by building all-solid-state symmetric supercapacitors with two identical electrodes. The Ni0.05Sn0.95S have a high specific device capacitance with a noteworthy energy density (46.78 Wh kg−1) and the highest power density (46 KW kg−1). The energy-storage characteristics of the Ni0.05Sn0.95S are better than those of previously reported material, implying that it has enormous promise for next-generation energy-storage systems.

High Areal Capacity and Long Cycle Life Flexible Mild Quasi‐Solid‐State Ag–Zn Battery with Dendrite‐Free Anode

Silver‐zinc (Ag–Zn) batteries are a promising battery system for flexible electronics owing to their high safety, high energy density, and stable output voltage. However, poor cycling performance, low areal capacity, and inferior flexibility limit the practical application of Ag–Zn batteries. Herein, we develop a flexible quasi‐solid‐state Ag–Zn battery system with superior performance by using mild electrolyte and binder‐free electrodes. Copper foam current collector is introduced to impede the growth of Zn dendrite, and the structure of Ag cathode is engineered by electrodeposition and chloridization process to improve the areal capacity. This novel battery demonstrates a remarkable cycle retention of 90% for 200 cycles at 3 mA cm−2. More importantly, this binder‐free battery can afford a high capacity of 3.5 mAh cm−2 at 3 mA cm−2, an outstanding power density of 2.42 mW cm−2, and a maximum energy density of 3.4 mWh cm−2. An energy management circuit is adopted to boost the output voltage of a single battery, which can power electronic ink display and Bluetooth temperature and humidity sensor. The developed battery can even operate under the extreme conditions, such as being bent and sealed in solid ice. This work offers a path for designing electrodes and electrolyte toward high‐performance flexible Ag–Zn batteries.

Multiphase Cu-Ni selenide nanocomposite electrode materials for high-performance hybrid supercapacitors

Metal vanadates/selenides are an advantageous electrode candidate for energy storage and conversion devices, owing to their low cost, good structural stability, high electroactivity, and abundance. Herein, firstly, copper oxide/nickel-vanadium oxide (CuO/Ni3V2O8) (CuO/NVO) nanosheets were rationally prepared via a facile hydrothermal method, followed by calcination process. Furthermore, the evolution of morphology was systematically examined at different growth times of 7, 9, and 11 h. Among the prepared samples, the CuO/NVO electrode synthesized for 9 h (CuO/NVO-9 h) revealed a high areal capacity (CA) value of 183.1 µAh cm−2 (specific capacity (CS) value of 89mAh g−1). Additionally, to boost the electrochemical performance of the CuO/NVO-9 h electrode, selenium (Se) was introduced in the N2 gas atmosphere. The resultant Cu6.0Se5.22/Ni2.0V4.0Se8.0 (CuSe/NiVSe) electrode with mixed morphology exhibited an improved CA value of 236.1 µAh cm−2 (CS value of 94.4mAh g−1) with good cycling retention of 103.8%. Moreover, the constructed CuSe/NiVSe(+)//AC(−) hybrid supercapacitor (HSC) device delivered a good energy density value of 0.173 mWh cm−2 (40.7 Wh kg−1) at a power density value of 16.1mW cm−2 (3040.4 W kg−1). Finally, the real-time application of the HSC device was also tested by energizing various electronic gadgets.

Performance improvement of a Ag-ion controlled molecular-gap atomic switch by reducing a switching area for applying to a deep learning system

In today’s advanced information society, hardware-based neuromorphic systems attract much attention for achieving more efficient information processing. Hardware-based neuromorphic systems need devices that change their resistance in an analog manner like biological synapses. A molecular-gap atomic switch exhibits analog resistance change over a wider range compared to other non-volatile memory devices. However, several issues remain with the device, such as in cyclic endurance and retention. In this study, we fabricated a molecular-gap atomic switch with a reduced switching area. We expected that the reduction would limit the number of Ag+ cations that contribute to a switching phenomenon and solve the remaining issues. The fabricated devices endured 1000 switching cycles and exhibited stable analog resistance change. Deep learning was successfully demonstrated using 293 fabricated devices as synapses, which resulted in the accuracy of 93.65% in 26th epoch in a 5 × 5 pixel image classification task.

One-step hydrothermal synthesis of high-performance stable Ni-doped 1T-MoS2 electrodes for supercapacitors

Elemental-doped is considered as an effective strategy to modulate the electronic structure of Metallic MoS2 (i.e., 1T-MoS2) and enhance its electrochemical performance. Herein, DFT is applied to predict the electronic structure of different transition metals (TMs) doped 1T-MoS2. Based on the results, stable Ni-doped 1T-MoS2 (N3MS) is synthesized in a propionic acid (PA) aided system. Electrochemical tests show that N3MS possesses an excellent specific capacitance of 2461.2 F·g−1 at 1 A·g−1 and a cycle retention rate of 85.67 % at 10 A·g−1 for 1000 cycles due to the critical contribution of Ni-doped to electronic structure modulation. Meanwhile, in-situ Raman measurements show that the active sites of N3MS are Mo3+ and Ni2+. The assembled N3MS//ZnO/ZnS-C hybrid device shows a specific capacitance of 242.28 F·g−1 at 1 A·g−1, an excellent energy density of 65.96 Wh·kg−1 at the power density of 700 W·kg−1 and the excellent stability for up to 2000 cycles (77.26 % retention at 5 A·g−1). This work proves the significant contribution of elemental doping to modulate electronic structures and improve electrochemical performance.

Domestication effects on nitrogen allocation, internal recycling and nitrogen use efficiency in the perennial new crop Silphium integrifolium (Asteraceae)

AbstractImprovements in seed yield during domestication and breeding are frequently achieved moving plants from the conservative syndrome of the plant economic spectrum towards the more acquisitive side, changing how plants acquire, allocate, use and store C and nutrients in relation to their wild relatives. The aims were to evaluate if domestication changed the N allocation, the internal plant N recycling (N resorption efficiency and proficiency, and N storage) and N‐use‐efficiency, in the perennial new crop Silphium integrifolium. We compared in a field experiment repeated in two locations (Kansas and Patagonia), a Wild (W) and two improved accessions, with high‐ (HYI) and low‐seed yield improved (LYI) accessions. HYI accessions produced more than twice the biomass and acquired twofold more N than LYI and Wild accessions. Changes in proportional N allocation were similar in both improved accessions (HYI and LYI) and locations: higher allocation to leaves and lower to the crown at pre‐anthesis (growth‐storage trade‐off) and higher allocation to seeds and lower to the crown at maturity (reproduction‐storage trade‐off). HYI and LYI allocated 50% more N to seeds in average, reducing a 31% the N allocated to the crown in relation to the Wild. Nitrogen use efficiency (NUE) and mean residence time (MRT) of N were reduced in both improved accessions. In HYI, the lower MRT was related to the lower storage of N in the crown and N removal through seed production, and in LYI was the result of the N lost through leaf senescence. HYI produced litter with lower N concentration (more proficient) that the wild accession. These could decrease the net N mineralization rate and soil N availability at long term. HYI plants should require higher external N inputs to the soil to sustain their N uptake requirements. LYI and Wild accessions, had lower resorption efficiency, but N recycled was allocated to the crown for future remobilization and uses (better internal cycling). The leaf litter type of these accessions with higher N content should sustain faster N‐cycles rates and N release to the soil. If the focus is on the ecosystem services, HYI accessions could help achieve a reduction in nitrate leaching by maximizing N uptake, N resorption and N removal through seed (i.e. nitrate catch crop), and also produce crop residues that slow down biogeochemical cycling and soil nutrient retention.

Nanocomposite Engineering of a High‐Capacity Partially Ordered Cathode for Li‐Ion Batteries (Adv. Mater. 13/2023)

Li-Ion Battery Cathodes In article 2208423, Hyun-Wook Lee, Jinhyuk Lee, Dong-Hwa Seo, and co-workers reveal the multiphase heterogeneous nature of ultrahigh-energy Mn-based partially disordered Li-ion cathodes through combined experimental and computational studies. This fundamental understanding enables novel nanocomposite design, wherein a phase fraction of the nanocomposites is manipulated. Consequently, cathodes engineered via nanocomposite engineering exhibit superior reversible redox properties and improved cycle retention.