Local Strong Solvation Electrolyte Trade-Off between Capacity and Cycle Life of Li-O2 Batteries,Advanced Functional Materials

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Local Strong Solvation Electrolyte Trade-Off between Capacity and Cycle Life of Li-O2 Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-07-17 , DOI: 10.1002/adfm.202101831
Jingning Lai ₁ , Hanxiao Liu ₁ , Yi Xing ₁ , Liyuan Zhao ₁ , Yanxin Shang ₁ , Yongxin Huang _{1,

2} , Nan Chen _{1,

2} , Li Li _{1,

2,

3} , Feng Wu _{1,

2,

3} , Renjie Chen _{1,

2,

3}

Affiliation

Li-O₂ batteries are promising energy storage devices with ultra-high theoretical energy density. However, in practice they show severe capacity fading and limited cycle life, meaning that more suitable electrolytes are urgently needed. Here, solvents are combined with high donor number and low donor number, and a Li salt to produce a new local strong solvation effect electrolyte. High discharge capacity and good cycling performance are achieved when the optimized electrolyte is used in a Li-O₂ battery. The optimized electrolyte inhibits side reactions within the battery and facilitates stable solid electrolyte interphase film formation on the surfaces of Li anode. This work opens a new route for the design of high-performance electrolytes to increase both capacity and cycle life of Li-O₂ batteries.

中文翻译：

Li-O2 电池容量和循环寿命之间的局部强溶剂化电解质权衡

Li-O ₂电池是具有超高理论能量密度的有前途的储能装置。然而，在实践中，它们表现出严重的容量衰减和有限的循环寿命，这意味着迫切需要更合适的电解质。在这里，溶剂与高供体数和低供体数以及锂盐相结合，产生一种新的局部强溶剂化效应电解质。当优化的电解质用于 Li-O ₂时，可实现高放电容量和良好的循环性能电池。优化的电解质抑制了电池内的副反应，并有利于在锂负极表面形成稳定的固体电解质界面膜。这项工作为设计高性能电解质以提高 Li-O ₂电池的容量和循环寿命开辟了一条新途径。

更新日期：2021-07-17

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