Concentrated electrolytes based on dual salts of LiFSI and LiODFB for lithium-metal battery

被引：50

作者：

Liu, Xiaoyan ^{[1
]}

Shen, Chao ^{[1
,4
]}

Gao, Na ^{[2
]}

Hou, Qian ^{[1
]}

Song, Fei ^{[3
]}

Tian, Xiuli ^{[3
]}

He, Ye ^{[3
]}

Huang, Jihong ^{[3
]}

Fang, Zhao ^{[2
]}

Xie, Keyu ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Ctr Nano Energy Mat, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

[2] Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Shaanxi, Peoples R China

[3] Dongguan Hisun New Energy Mat Co LTD, Dongguan 523797, Peoples R China

[4] Xian Univ Technol, Inst Adv Electochem Energy, Xian 710048, Shaanxi, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2018年 / 289卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Concentrated electrolytes; Dual salts; Dendrite growth; Al corrosion; Li-metal battery; COLLECTOR CORROSION; ALUMINUM CORROSION; DENDRITE-FREE; ION; ANODES; PERFORMANCE; LIQUID; ELECTROCHEMISTRY; ELECTRODES; STABILITY;

D O I：

10.1016/j.electacta.2018.09.085

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Li-metal battery (LiMB) has received considerable attention as an alternative energy storage device to Li-ion battery in recent years. However, uncontrolled Li dendrite growth prevents the practical applications of LiMB. Herein, we report the use of concentrated electrolytes based on dual salts of lithium bis(fluorosulfonyl) imide (LiFSI) and lithium difluoro(oxalato) borate (LiODFB) to suppress Li dendrite growth. The compatibility of electrolyte and LiFePO4 cathode was further verified by the long capacity retention and high rate performance of Li/LiFePO4 battery. The superior electrochemical performance was attributed to the concentrated electrolyte, which could simultaneously suppress Li dendrite growth at the anode side and Aluminum (Al) current collector corrosion at the cathode side. This work provides new insights to develop high-performance LiMBs by carefully tailoring the multivariate composition of concentrated electrolyte. (C) 2018 Published by Elsevier Ltd.

引用

页码：422 / 427

页数：6

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