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中国物理学会期刊

低温水系碱金属离子电池的研究进展

CSTR: 32037.14.aps.72.20230024

Recent progress in aqueous akali-metal-ion batteries at low temperatures

CSTR: 32037.14.aps.72.20230024
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  • 水系碱金属离子电池因具有高安全性、低成本和环境友好等优势而成为前沿研究的热点之一, 在大规模储能领域具有良好的应用前景. 然而, 许多水系碱金属离子电池在低温条件下出现运行故障或展现出极低的放电比容量, 严重限制了其在恶劣的严寒气候条件下的广泛应用. 本综述首先梳理了近年来低温水系碱金属离子电池的研究进展. 随后从电解液、电极和界面三个方面分别探讨了水系碱金属离子电池在低温下运行所面对的挑战和相应的失效机制, 同时系统地介绍了提高电池低温性能的改性策略并加以评述, 以期为水系碱金属离子电池低温性能的进一步提升及其实际应用提供参考并指明方向.

     

    Aqueous alkali-metal-ion batteries are a popular frontier research area, expected to apply for large-scale energy storage due to their high safety, low cost, and environmental friendliness. Depending on diversified social development, batteries ought to function in various ambient, including polar regions and high-altitude locales. Delivering excellent electrochemical performance at low temperatures is crucial to develop aqueous alkali-metal-ion batteries. This review summarizes the representative research progress in the field of aqueous low-temperature alkali-metal-ion batteries in recent years, based on the subjects of electrolyte, electrode, and interface. Firstly, we discussed the challenges of aqueous alkali-metal-ion batteries operated at low temperatures and the corresponding failure mechanisms. At subzero temperatures, aqueous alkali-metal-ion batteries couldn't work or exhibit little capacity, arising from the frozen electrolytes, electrode materials with slow kinetics, and huge interface impedances, which seriously limits their wide application in low-temperature conditions. Then, combined with the latest research work, various strategies have been investigated to improve the electrochemical performance of batteries at low temperatures. To date, the strategies for reducing the freezing point of electrolytes have primarily focused on breaking H-bonds between free water molecules by increasing salt concentration, adding organic/inorganic additives, and using hydrogel as electrolytes. In terms of electrodes, the related studies have concentrated on regulating the structure and morphology of electrodes, introducing the dual ion battery mechanism, and using organic materials and Zn electrodes to alleviate the slow ion dynamics of electrodes. In addition, adding appropriate organic solvents that can generate protective layers with low interface impedance on the electrode surface in the electrolyte can also improve the low-temperature performance of aqueous alkali-metal-ion batteries. Finally, we evaluated multi-dimensionally all strategies, expected to provide a comprehensive reference and point out the direction for the further improvement and practical application of the aqueous alkali-metal-ion batteries at low temperatures.

     

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