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硫基分子诱导导向沉积用于长期金属电池

Da Zhang^1,2, Rong Gu¹, Yunxu Yang¹

¹Shanghai Key Laboratory of Materials Protection and Advanced Materials Electric Power, Shanghai University of Electric Power, Shanghai, 200090, P. R. China.

Angewandte Chemie (International ed. in English)

|February 4, 2024

概括

铜基板上的新型活性层促进了统一的涂层,并为高性能金属电池 (LMB) 形成稳定的固体电解质介相 (SEI). 这一进步使得无树的阳极成为可能,并提高了电池的寿命和低温操作.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

金属电池 (LMB) 面临着状岩石生长和不稳定的Li+运输方面的挑战,这限制了它们的实际应用.
开发稳定的固体电解质界面 (SEI) 对于高性能LMB至关重要.

研究的目的:

设计一个活性层,诱导导导向的Li+沉积,并形成一个高度结晶的SEI,用于无树的Li阳极.
为了提高金属电池的性能和稳定性.

主要方法:

用2,4,6-三基硫烯化物涂覆铜基板,以创建一个活性层.
描述SEI层和评估Li+沉积行为.
测试了改造的LICHABILITYCu,LICHABILITYLi和LICHABILITYLCO电池的电化学性能.

主要成果:

在SEI中的性-SO2-群体促进了沿着 (110) 晶体表面均的Li+运输和沉积,防止了树岩的形成.
在700个循环中,体中体Cu电池的沉积效率达到了99.8%,体中体Li电池运行了1100小时.
修改后的SEI提高了14倍的容量保留能力,与传统的SEI相比,在LCO电池中保持了83.2%的沉积效率在-60°C下.

结论:

形成的活性层和由此产生的晶体SEI有效调节Li+沉积,使得无树的阳极成为可能.
该策略显著提高了金属电池的循环寿命,稳定性和低温性能.
这种方法为推进下一代高能量密度电池提供了一个有希望的途径.

关键词:

阳极是一种阳极.金属电池金属电池高结晶的固体电解质相间阶段.石化爱好者群体石化爱好者群体导向的沉积沉积.

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