Recent progress in electrolyte design for advanced lithium metal batteries

SmartMat Pub Date : 2023-02-13 DOI:10.1002/smm2.1185
Mingnan Li, Caoyu Wang, K. Davey, Jingxi Li, Guanjie Li, Shilin Zhang, Jianfeng Mao, Zaiping Guo
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引用次数: 7

Abstract

Lithium metal batteries (LMBs) have attracted considerable interest for use in electric vehicles and as next‐generation energy storage devices because of their high energy density. However, a significant practical drawback with LMBs is the instability of the Li metal/electrolyte interface, with concurrent parasitic reactions and dendrite growth, that leads to low Coulombic efficiency and poor cycle life. Owing to the significant role of electrolytes in batteries, rationally designed electrolytes can improve the electrochemical performance of LMBs and possibly achieve fast charge and a wide range of working temperatures to meet various requirements of the market in the future. Although there are some review papers about electrolytes for LMBs, the focus has been on a single parameter or single performance separately and, therefore, not sufficient for the design of electrolytes for advanced LMBs for a wide range of working environments. This review presents a systematic summary of recent progress made in terms of electrolytes, covering the fundamental understanding of the mechanism, scientific challenges, and strategies to address drawbacks of electrolytes for high‐performance LMBs. The advantages and disadvantages of various electrolyte strategies are also analyzed, yielding suggestions for optimum properties of electrolytes for advanced LMBs applications. Finally, the most promising research directions for electrolytes are discussed briefly.
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先进锂金属电池电解液设计研究进展
锂金属电池(lmb)由于其高能量密度而在电动汽车和下一代储能设备中引起了相当大的兴趣。然而,lmb的一个显著的实际缺点是锂金属/电解质界面的不稳定性,同时存在寄生反应和枝晶生长,导致库仑效率低和循环寿命差。由于电解质在电池中的重要作用,合理设计的电解质可以提高lmb的电化学性能,并有可能实现快速充电和大范围的工作温度,以满足未来市场的各种要求。虽然有一些关于lmb电解质的综述论文,但重点是单独的单个参数或单个性能,因此不足以设计适用于广泛工作环境的先进lmb电解质。这篇综述系统地总结了电解质方面的最新进展,涵盖了对机制的基本理解、科学挑战和解决高性能lmb电解质缺陷的策略。分析了各种电解质策略的优缺点,为lmb的高级应用提供了最佳电解质性能的建议。最后,对电解质的研究方向进行了简要的讨论。
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