Additive-Assisted Novel Dual-Salt Electrolyte Addresses Wide Temperature Operation of Lithium-Metal Batteries

被引：175

作者：

Shangguan, Xuehui ^{[1
,2
,3
]}

Xu, Gaojie ^{[1
]}

Cui, Zili ^{[1
]}

Wang, Qinglei ^{[1
,3
]}

Du, Xiaofan ^{[1
]}

Chen, Kai ^{[1
]}

Huang, Suqi ^{[1
]}

Jia, Guofeng ^{[2
]}

Li, Faqiang ^{[2
]}

Wang, Xiao ^{[1
]}

Lu, Di ^{[1
]}

Dong, Shanmu ^{[1
]}

Cui, Guanglei ^{[1
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, Qingdao 266101, Shandong, Peoples R China

[2] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources Chem Qinghai Prov, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China

[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

SMALL | 2019年 / 15卷 / 16期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

additive; dual-salt electrolyte; lithium-metal battery; solid electrolyte interphase; wide temperature operation; HIGH-AREAL-CAPACITY; LONG CYCLE-LIFE; MIXED SALTS; LIFEPO4-BASED BATTERIES; POLYMER ELECTROLYTE; ION; PERFORMANCE; DIFLUOROPHOSPHATE; IMPROVE; LIPO2F2;

D O I：

10.1002/smll.201900269

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, self-synthesized lithium trifluoro(perfluoro-tert-butyloxyl)borate (LiTFPFB) is combined with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to formulate a novel 1 m dual-salt electrolyte, which contains lithium difluorophosphate (LiPO2F2) additive and dominant carbonate solvents with low melting point and high boiling point. The addition of LiPO2F2 into this novel dual-salt electrolyte dramatically improves cycleability and rate capability of a LiNi0.5Mn0.3Co0.2O2/Li (NMC/Li) battery, ranging from -40 to 90 degrees C. The NMC/Li batteries adopt a Li-metal anode with low thickness of 100 mu m (even 50 mu m) and a moderately high cathode mass loading level of 10 mg cm(-2). For the first time, this paper provides valuable perspectives for developing practical lithium-metal batteries over a wide temperature range.

引用

页数：8

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