Al Corrosion Research Articles

Disintegration of Thin Liquid Metal Films Engendered by Aluminum Corrosion

AbstractLiquid metals (LMs) illustrate a fantastic future. Thus, great endeavors are made to earn a comprehensive understanding of this fluid and carve it into a niche. Herein, by revisiting the combination of Ga‐based LMs and aluminum (Al), a new phenomenon, namely the disintegration of LM films on encountering water, is identified. Deviating from previous investigations where the LM generally took the form of bulk puddles, the LM‐Al slurry is spread as thin films here. In this case, Al debris embedded in the LM matrix hydrolyzes and therefore can exert disjoining pressure strong enough to split the thin film into countless tiny LM droplets. Based on this mechanism, transient circuits independent of substrate decomposition are realized. Furthermore, taking advantage of the portfolio strategy of pure LM and the LM‐Al slurry, novel concepts of flood warning and information storage and encryption are demonstrated. Integrating these functions all in one demonstrates the versatility of the disintegration of thin LM films engendered by Al corrosion, which provides a scientific insight into ephemeral art and makes the Ga─Al combination more illuminating.

Ionic Liquid Additive Mitigating Lithium Loss and Aluminum Corrosion for High-Voltage Anode-Free Lithium Metal Batteries.

Concentrated electrolytes based on lithium bis(fluorosulfonyl)imide (LiFSI) have been proposed as an effective Li-compatible electrolyte for anode-free lithium metal batteries (AFLMBs). However, these electrolytes suffer from severe aluminum corrosion at an elevated potential. To address this issue, we propose a binary ionic liquid (IL) electrolyte additive comprising the 1-methyl-1-butyl pyrrolidinium cation (Pyr14+), difluoro(oxalate)borate anion (DFOB-), and difluorophosphate (PO2F2-) anion to mitigate the Li inventory loss and Al corrosion in 4 M LiFSI/DME electrolyte simultaneously. On the anode side, the IL additive facilitates the formation of a robust Li3N- and LiF-rich solid electrolyte interphase, promoting highly reversible Li plating/stripping and uniform Li deposition. Additionally, the ILs alter the Li+ solvation structure, leading to enhanced tLi+ and rapid Li+ desolvation kinetics. Concurrently, on the cathode side, the ILs aid in the generation of dense LiF- and AlF-rich passivation films against Al corrosion. By using the IL-added electrolyte, the Cu||LiMn0.7Fe0.3PO4 cell operates stably at 4.5 V, and the Cu||NCM613 cell with a high loading of 4.0 mA h cm-2 sustains 142 cycles until 80% capacity retention. This research contributes to a deeper understanding of the IL additive mechanism at the electrode-electrolyte interfaces and offers a straightforward approach to designing practical high-voltage AFLMB electrolytes.

Corrosion evaluation of Al-Cu-Mn-Zr cast alloys in 3.5% NaCl solution

Corrosion behavior of cast Al-Cu-Mn-Zr (ACMZ) and RR350 alloys was compared to a cast 319 alloy in 3.5 wt.% NaCl. After 168 h immersion, ACMZ and RR350 alloys suffered from preferential attack adjacent to intermetallic particles decorated at grain boundaries while the attack in 319 occurred in eutectic Al-Si dendritic boundaries. Electrochemical data allowed semiquantitative comparison of alloy resistance to corrosion initiation, and ACMZ type alloys, including RR350 and three alloys with higher Cu, were considered more resistant than 319 due to the absence of deleterious Si particles. In case of 319, such Si particles presumably drove higher micro-galvanic influence to initiate and sustain Al corrosion. With lower susceptibility to corrosion initiation, ACMZ alloys should exhibit higher or at minimum similar resistance compared to cast 319.

Rapid hydrogen generation from Al-Si alloy and recovery of the byproducts

The metal hydrolysis reaction is a convenient and user-friendly strategy for obtaining high-purity hydrogen on-demand. However, removal of the oxide and rapid corrosion of the metal are critical for hydrogen utilization in fuel cell. In this work, commercial Al-Si alloy, which is widely used in metal casting, are used as a raw material to generate high-purity hydrogen. Our results indicate that hydrogen evolution and Al corrosion are influenced by NaOH concentration, elevated temperature from exothermic reaction of Al or Si with OH–, decreased particle size of Al and the Al/Si micro-galvanic cell. And the maximum hydrogen generation rate is 116.4 mL (0.4 g)−1 min−1 for Al-10Si. This reaction consumes OH– ions from NaOH following addition of the first two batches, and then OH– ions derived from Al(OH)−4 or Al(OH)3.The hydrogen generated is transferred to a fuel cell; a stable current of ca. 1 A and voltage of about 0.25 V are obtained for Al-10Si during continuous hydrogen input. The by-product of pure Al(OH)3 and Si can be recovered separately. This investigation of Al-Si alloys as hydrogen generation materials may provide guidance for the exploration of other Si-based materials.

Architecture of a remelted layer with the nano-lamellar structure at the surface of Fe[sbnd]B materials via laser remelting to resist liquid aluminum corrosion

In this work, a significant enhancement of corrosion resistance of Fe-B materials in liquid Al (750 °C), with a corrosion rate one order of magnitude lower than that of H13 die steel, has been achieved by constructing nano-lamellar structures in the matrix. Results indicate that the nano-lamellar structure can not only effectively obstruct the interdiffusion between the Al and Fe atoms, restricting the growth of corrosion layers, but also accommodate sufficient growth and thermal stresses, suppressing the spallation of corrosion products. Furthermore, the ceramic nanoparticles in-situ formed in the nano-lamellar structure can inhibit the inward diffusion of Al atoms, greatly enhancing the corrosion resistance of α-Fe matrix. Besides, they also provide a robust pinning effect on the corrosion interface, improving the adhesion strength of corrosion products with the matrix. The architecture of nano-lamellar structure with nanoparticles may provide a novel strategy against liquid Al corrosion and shed new light on the development of corrosion-resistant materials.

Comprehensive study on the corrosion inhibition of aluminum in HCl by N1, N1'-(ethane-1,2-diyl)di(ethane-1,2-diamine): Experimental and theoretical approaches

The inhibitory effects of the novel molecule N1, N1'-(ethane-1,2-diyl)di(ethane-1,2-diamine) (TETA) on aluminum (Al) corrosion were investigated in 0.2, 0.3, and 0.4 M HCl solutions. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), quantitative techniques, and surface morphology characterisation were utilised. Surface morphology characterisation via atomic force microscopy (AFM) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDS) confirmed the efficacy of the inhibitor in preventing corrosion. Weight loss research revealed that the protective efficacy of TETA grows with increasing concentration but shrinks with increasing temperature of the acidic solution. The findings indicate a marked increase in inhibition efficiency as TETA content rises, reaching 99.0 % when measured by the weight loss method, 98.34% through EIS, and 94.13% via electrochemical polarization. Polarization curves show that TETA stops hydrochloric acid from acting on the anodic type. Both the charge-transfer resistance and the double-layer capacitance decrease with increasing inhibitor concentration, as shown by the adsorption mechanism and supported by the EIS results. "The Langmuir isotherm and negative Gibb's free energy values demonstrate that the inhibitor molecules cling to the metal and that they adsorb to the aluminium spontaneously. In addition to analysing TETA via density functional theory (DFT), the adsorption of TETA on the surface of aluminium (Al) was examined via molecular dynamics (MD) simulations. The results show that the TETA molecule successfully blocks the corrosion process.

Engineering the solvent-anion interactions of LiTFSI-based dual-salt electrolytes to sustain high-performance NCM622 cathodes

Electrolytes play a vital role in determining the performances of lithium-ion batteries (LIBs), especially the high-voltage LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode in LiTFSI-based electrolytes. Herein, we report a high-capacity and stable NCM622 cathode that can be realized in LiTFSI-based (named T) carbonate electrolytes by tuning the intermolecular interactions using the added LiDFOB (named D). In the 1 M dual-salt electrolyte, the cathode failure and Al corrosion are suppressed in the 4.5 V-NCM622||Li batteries, because a uniform interfacial layer and weaker Li+-solvent interactions are built to inhibit the parasitic reactions. As a result, the capacity retention reaches 94.68% after 200 cycles and the 10 C-rate capacity is about 160 mA h g-1 in the 1 M T + D dual-salt electrolyte. Unlike the commonly used electrolyte, the FEC additive increases the de-solvation barrier and disturbs the cycle stability in (T + D) dual-salt systems. Density functional theory (DFT) calculation and nuclear magnetic resonance (NMR) spectra reveal that the additive FEC changes the solvent-solvent and solvent-anion interactions in the presence of T + D, which weakens the electrolyte-cathode compatibility. This work indicates that regulating the solvation structure and interfacial chemistry from solvent-solvent/anion interactions is promising for designing high-performance LIBs by using dual‐salt electrolytes.

Effect of adsorption of two green biopolymers on the corrosion of aluminum in 1.0 M NaCl solution: Physicochemical, spectroscopic, surface and quantum chemical exploration

Although aluminum is an extremely versatile material and can be manufactured and used for a wide range of industrial purposes, it has a limited resistance to corrosion. Hence, the efficacy of two linear biopolymers, keratan (Ker) and chitosan (Chi), was explored, for the first time, as ecologically safe metallic corrosion inhibitors (CIs) for Al in 1.0 M NaCl solution at different temperatures. For performing this study, several experimental and theoretical methods were applied. By combining these methods, it was confirmed that the investigated biopolymers were set to be effective inhibitors for Al corrosion in 1.0 M NaCl solution. Using a 500 mg/L dose of CIs, inhibition efficiencies (% IEs) of 92.7 % and 86.4 % were achieved for Ker and Chi, respectively, indicating their strong adsorption on the metal surface. Thermodynamic and kinetic investigations signified that the adsorption was founed to be physical and obeyed the Langmuir isotherm. The kinetics and mechanism of Al corrosion as well as its inhibition by the tested biopolymers were inspected. The results demonstrated that these biopolymers behaved as mixed-type and interface-type inhibitors. To investigate the inhibition mechanism, theoretical quantum chemical methods were also applied. The experimental investigations were validated by theoretical computations.

Aluminum Corrosion Chemistry in High-Voltage Lithium Metal Batteries with LiFSI-Based Ether Electrolytes.

High-voltage Li metal batteries (LMBs) based on ether electrolytes hold potential for achieving high energy densities exceeding 500 Wh kg-1, but face challenges with electrolyte oxidative stability, particularly concerning aluminum (Al) current collector corrosion. However, the specific chemistry behind Al corrosion and its effect on electrolyte components remains unexplored. Here, our study delves into Al corrosion in the representative LiFSI-DME electrolyte system, revealing that low-concentration electrolytes exacerbate Al current collector corrosion and solvent decomposition. In contrast, high-concentration electrolytes mitigate these issues, enhancing long-term stability. Remarkably, LiFSI-0.7DME electrolyte demonstrates exceptional stability with up to 1000 cycles at high voltage without significant capacity decay. These findings offer crucial insights into Al corrosion mechanisms in ether-based electrolytes, advancing our comprehension of high-voltage LMBs and facilitating their development for practical applications.

Ether-Based Gel Polymer Electrolyte for High-Voltage Potassium Ion Batteries.

Low-concentration ether electrolytes cannot efficiently achieve oxidation resistance and excellent interface behavior, resulting in severe electrolyte decomposition at a high voltage and ineffective electrode-electrolyte interphase. Herein, we utilize sandwich structure-like gel polymer electrolyte (GPE) to enhance the high voltage stability of potassium-ion batteries (PIBs). The GPE contact layer facilitates stable electrode-electrolyte interphase formation, and the GPE transport layer maintains good ionic transport, which enabled GPE to exhibit a wide electrochemical window and excellent electrochemical performance. In addition, Al corrosion under a high voltage is suppressed through the restriction of solvent molecules. Consequently, when using the designed GPE (based on 1 m), the K||graphite cell exhibits excellent cycling stability of 450 cycles with a capacity retention of 91%, and the K||FeFe-Prussian blue cell (2-4.2 V) delivers a high average Coulombic efficiency of 99.9% over 2200 cycles at 100 mA g-1. This study provides a promising path in the application of ether-based electrolytes in high-voltage and long-lasting PIBs.

Achieving the Inhibition of Aluminum Corrosion by Dual-Salt Electrolytes for Sodium-Ion Batteries.

Sodium bis(fluorosulfonyl)imide (NaFSI) electrolytes are renowned for their superior physicochemical and electrochemical properties, making them ideal for high-performance sodium-ion batteries (SIBs). However, severe oxidative dissolution of aluminum current collectors (commonly known as Al corrosion) in NaFSI-based electrolytes occurs at high potentials. To address this challenge, aiming to understand the Al corrosion mechanism and develop strategies to inhibit corrosion, we propose dual-salt electrolytes using 0.8 mol L-1 (M) NaFSI and 0.2 M of a second fluorine-containing sodium salt dissolved in EC/PC solutions (1:1, v/v) to construct an insoluble deposits layer on the Al. Dual-salt electrolytes adopting a second sodium salt capable of passivating the Al collector have been extensively investigated through various techniques, such as cyclic voltammetry, scanning electron microscopy, chronoamperometry, X-ray photoelectron spectroscopy, and charge-discharge tests. Our findings demonstrate that introducing sodium difluoro(oxalato)borate (NaDFOB) into the NaFSI electrolytes inhibits Al corrosion, which is attributed to the formation of insoluble deposits of Al-F (AlF3) and B-F containing polymers. Moreover, the capacity retention of Na||Na3V2(PO4)3 (NVP) cells using the NaFSI-NaDFOB dual-salt electrolyte reaches 99.2% along with a Coulombic efficiency over 99.3% at a 1 C rate after 200 cycles. This research provides a practical solution for passivating Al collectors in SIBs with NaFSI electrolytes and promotes the development of sodium batteries with long calendar lifetimes.

Anti-corrosion investigation of silver coated starch-chitosan nanocomposite on Al in NaOH wash solution

This work focuses on the effectiveness of a Starch-Chitosan nanocomposite containing embedded silver nanoparticles in preventing the Al corrosion in a 3 M NaOH system. Using Fourier Transform Infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), and X-Ray Powder Diffraction (X-RD) methods, the produced polymer nanocomposite was studied. Gravimetric, impedance, potentiodynamic polarization and SEM//EDAX techniques were used to test the efficiency of Starch-Chitosan nanocomposite embedded with silver nanoparticles (Ag@Starch-CS polymer nanocomposite) as an eco-friendly inhibitor. Activation parameters and adsorption isotherm support both physical and chemical adsorption mechanisms with robust protection efficiency. The Tafel curves validated that, Ag@Starch-CS polymer nanocomposite performs as an anodic type of corrosion inhibitor. The presence of OH, NH2, etc., groups in Ag@Starch-CS polymer nanocomposite was found to have contributed significantly to the inhibition process by interacting with the Al surface.

Aluminum Current Collector Corrosion Inhibition by a Newly Synthesized 5-Formyl-8-Hydroxyquinoline for Aqueous-Based Battery

Aluminum foil is the most frequently used as a cathodic current collector for batteries because of its high electrical conductivity, low cost, robust electrochemical properties, and low density. However, as next-generation batteries are created, serious corrosion poses new challenges to aluminum current collectors, especially with no effective additive in an aqueous electrolyte. A newly 5-formyl-8-hydroxyquinoline (FHQ) additive is designed and synthesized as an effective corrosion inhibitor for aluminum foil. The effect of FHQ on the corrosion of the Al current collector in an aqueous-based electrolyte has been investigated using electrochemical methods and spectroscopy techniques for assessing the corrosion inhibition efficacy and protective film formation on the Al surface. The Potentiodynamic polarization measurements indicated that the corrosion rate in millimeters per year (mmpy) of 1.37×10-3 is much lower in the aqueous electrolyte of 21 m LiTFSI with the FHQ additive than 2.29×10-2 in the electrolyte without an additive. Meanwhile, the Zn//LVPF configuration is developed as an efficient protocol to evaluate the corrosion prevention efficiency of inhibitors in an aqueous-based battery for the first time. The Zn//LVPF cell in the aqueous electrolyte with the FHQ additive provides much higher capacity retention and average Coulombic efficiency than the cell in the electrolyte in the absence of an additive. Interestingly, the Al corrosion prevention efficiency of the developed additive is also observed in an organic electrolyte-based battery. This work paves a new pathway to develop effective Al corrosion inhibitors for applications in lithium-ion batteries, especially in aqueous electrolytes. Keywords; Corrosion inhibitor; 8-hydroxyquinoline; 5-formyl-8-hydroxyquinoline; Doner/acceptor; HOMO-LUMO; Aluminum corrosion.

In-situ EIS for corrosion detection in LiFSI-based Li-ion batteries

LiFSI-based electrolytes are frontiers amongst candidates for future generation of high-voltage and high-temperature capable Li-ion batteries. Arguably, the biggest disadvantage of these electrolytes is their undesirable ability to corrode aluminium current collectors. Hence, suppressing the Al corrosion in such electrolytes has become a widely discussed topic. Despite that, there is a lack of studies focusing on in-situ approaches for the detection of such corrosion, even though such approaches are essential for the effective evaluation of the performance of Li-ion batteries containing novel LiFSI-based electrolytes. This work demonstrates the usage of EIS for the detection of corrosion of Al current collectors in NMC/Graphite cells containing 1.0 M LiFSI in EC:DMC (1:1, v/v). When cycled up to 4.2 V at 50 °C, cathode-side Nyquist plots displayed induction loops developing over the cycles, which were ascribed to the corrosion of Al current collectors, and whose presence was confirmed by SEM imaging. When the cut-off voltage was decreased to 3.7 V to maintain a native protective Al2O3 layer and hence suppress the corrosion, neither the induction loops in Nyquist plots nor pitting holes in SEM images were observed, confirming the link between the induction loops and the corrosion. This work aims to support designing and understanding of future experiments focused on suppressing the corrosion of Al current collectors in LiFSI-based high-voltage Li-ion batteries capable of operation at higher temperatures.

Electrocoagulation process with Fe/Al electrodes to eliminate pollutants from real and synthetic wastewater

This work investigated the effect of a victorious parameter of electrocoagulation (EC) on the removal of turbidity through batch reactor using Fe and Al electrodes. Synthetic (Sol 1, Sol 2) and natural wastewater (Sol 3) with different sodium chloride content were examined under different current densities (CD) and operating time. For the examined solutions conductivity, pH, total suspended solids (TSS) dissolved oxygen (DO) and energy consumption were measured. A novel approach examined the effect of solutions with selected operating parameters on Fe and Al corrosion using chemical and electrochemical tests. Using experimental data collected during the various parameters, a mathematical model of the electrocoagulation process was generated and assessed. FE-SEM images and EDX analyses for Fe and Al electrodes and XRD of coagulant particles, floc, generated by EC were also investigated. According to the findings, the ideal circumstances for the turbidity elimination from the examined solution were found to be as CD = 11 mA/cm2, pH ⁓ 7, and operating time = 20 min. Under these optimal circumstances, Al electrodes showed superior efficacy in removing than Fe electrodes for all examined solutions. The turbidity removal efficiency and the energy consumption were also found to be affected by NaCl content. The turbidity removal efficiencies reached their maximum value of 99 % for sol 3 where NaCl content was 3.45 × 10−1 M and energy consumption was 1.667 kWh/m3 by using Al anode.

Interaction of aluminum alloys with MKPC and Portland-based cements on the metal-matrix interface

Cementitious matrices are considered for the immobilisation of radioactive aluminium. The processes occurring at the interface between both materials are relevant for the long-term stability of the repository. The present study compares Ordinary Portland cement (OPC), CEM I-type, with alternative Portland blended cement (CEM IV and CEM I + 50% silica fume) and magnesium potassium phosphate cement (MKPC). Al A1050 and Al AA5754, with 3.5% Mg, have been used as reactive metal alloys. Two exposure conditions were employed: (1) water immersion and (2) isolated in sealed plastic films. Long-term corrosion monitoring (Ecorr, icorr and Vcorr) was evaluated to understand the effect of Al reactivity in the matrix. The associated H2 release was quantified to understand the changes at the metal/matrix interface. Furthermore, pore ion concentrations and the pore microstructure were evaluated. The metal/matrix interface alterations were analysed at the end of the tests. The study revealed that after 300 days of water immersion, the CEM I + 50% of silica fume matrix had reduced the pore solution pH down to 10.5 compared to CEM I, which remained high alkaline (pH 12.9), and CEM IV with no significant decreases (pH 12.3). In contrast, MKPC showed the lowest pH (7–9.8). Low Al corrosion rates were found with MKPC, followed by CEM I + 50% SF according to their lower pH. A corrosion product layer of 90-50 μm thickness was observed at the Al/CEM I matrix interface constituted of aluminium and oxygen. Furthermore, enrichment in Al was detected in the matrix (around 1 mm depth), causing the formation of ettringite nodules. Voids were detected at the interface level associated with the high volume of H2 released. The MKPC matrix showed no alteration at the metal/matrix interface due to the lower reactivity of the matrix and lower H2 release. A homogeneous and dense region (30 μm) rich in phosphorous, potassium and magnesium was observed near the metal surface.

Small-molecule organic electrode materials on carbon-coated aluminum foil for high-performance sodium-ion batteries

Organic molecular electrode materials are promising candidates in batteries. However, direct application of small molecule materials usually suffers from drastic capacity decay and inefficient utilization of active materials because of their high solubility in organic electrolytes and low electrical conductivity. Herein, a simple strategy is found to address the above issues through coating the small-molecule organic materials on a commercialized carbon-coated aluminum foil (CCAF) as the enhanced electrode. Both the experimental and calculation results confirm that the relatively rough carbon coating on the aluminum foil not only exhibits superior adsorption capacity of small-molecule organic electrode materials with a tight contact interface but also provides continuous electronic conduction channels for the facilitated charge transfer and accelerated reaction kinetics. In addition, the carbon coating also inhibits Al corrosion in electrochemical process. As a result, by using the tetrahydroxy quinone-fused aza-phenazine (THQAP) molecule as an example, the THQAP-CCAF electrode exhibits an excellent rate performance with a high capacity of 220 and 180 mAh g−1 at 0.1 and 2 A/g, respectively, and also a remarkable cyclability with a capacity retention of 77.3% even after 1700 cycles in sodium-ion batteries. These performances are much more superior than that of batteries with the THQAP on bare aluminum foil (THQAP-AF). This work provides a substantial step in the practical application of the small-molecule organic electrode materials for future sustainable batteries.

An XPS Study of Electrolytes for Li-Ion Batteries in Full Cell LNMO vs Si/Graphite.

Two different types of electrolytes (co-solvent and multi-salt) are tested for use in high voltage LiNi0.5Mn1.5O4||Si/graphite full cells and compared against a carbonate-based standard LiPF6 containing electrolyte (baseline). Ex situ postmortem XPS analysis on both anodes and cathodes over the life span of the cells reveals a continuously growing SEI and CEI for the baseline electrolyte. The cells cycled in the co-solvent electrolyte exhibited a relatively thick and long-term stable CEI (on LNMO), while a slowly growing SEI was determined to form on the Si/graphite. The multi-salt electrolyte offers more inorganic-rich SEI/CEI while also forming the thinnest SEI/CEI observed in this study. Cross-talk is identified in the baseline electrolyte cell, where Si is detected on the cathode, and Mn is detected on the anode. Both the multi-salt and co-solvent electrolytes are observed to substantially reduce this cross-talk, where the co-solvent is found to be the most effective. In addition, Al corrosion is detected for the multi-salt electrolyte mainly at its end-of-life stage, where Al can be found on both the anode and cathode. Although the co-solvent electrolyte offers superior interface properties in terms of the limitation of cross-talk, the multi-salt electrolyte offers the best overall performance, suggesting that interface thickness plays a superior role compared to cross-talk. Together with their electrochemical cycling performance, the results suggest that multi-salt electrolyte provides a better long-term passivation of the electrodes for high-voltage cells.

Osteoporosis Failure of Aluminum Current Collector Induced Crosstalk Degradation at the Imide-Type Lithium Salt Comprised Practical-Level Lithium-Ion Batteries

The atypical failure mechanism caused by the inclusion of lithium bis(fluorosulfonyl)imide (LiFSI) salt in lithium-ion batteries (LIB) is elucidated. When subjected to elevated temperature cycling, the LiFSI salt triggers the degradation of the aluminum current collector, leading to the dissolution of Al ions into the electrolyte. These dissolved Al ions then migrate toward the negative electrode surface where they spontaneously reduce and form Al deposits due to the low electrode potential. This Al deposition further catalyzes the cathodic decomposition of the electrolyte, impacting the interphasial resistance of the negative electrode and consuming both Li ions and electrolyte components. Upon extended cycling with LiFSI-containing electrolytes, a notable decline in the reversible capacity of LIB becomes evident due to cross-talk failure resulting from Al current collector corrosion. Consequently, to enhance the cycling performance of LIBs using LiFSI-based electrolytes, it is necessary to simultaneously prevent Al corrosion and subsequent deposition on the surface of the negative electrode.

On the identification of favourable factors for corrosion inhibition of aluminium by 8-hydroxyquinoline and its derivatives: DFT and electrochemical studies

Computational and electrochemical experimental approaches were combined to identify factors which would be favourable or detrimental to corrosion inhibition of aluminium by 8-hydroxyquinoline (8Hq) and its sulfonic derivative (8HqSH). 8HqSH exhibited a strong adsorption on Al(111) but a greater solubility in water than 8Hq, including Al complexes, which might increase Al corrosion. This was confirmed by the electrochemical measurements. In the presence of 8HqSH, an acceleration of the aluminium dissolution was observed, whereas, in the presence of 8Hq, a protective film was formed on the Al surface.