Lithium bis(fluorosulfonyl)imide/poly(ethylene oxide) polymer electrolyte

被引：304

作者：

Zhang, Heng ^{[1
]}

Liu, Chengyong ^{[1
]}

Zheng, Liping ^{[1
]}

Xu, Fei ^{[1
]}

Feng, Wenfang ^{[1
]}

Li, Hong ^{[2
]}

Huang, Xuejie ^{[2
]}

Armand, Michel ^{[3
]}

Nie, Jin ^{[1
]}

Zhou, Zhibin ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Large Format Battery Mat & Syst, Wuhan 430074, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[3] CIC Energigune, Alberto Einstein 4801510, Minano Alava, Spain

来源：

ELECTROCHIMICA ACTA | 2014年 / 133卷

基金：

中国国家自然科学基金;

关键词：

Lithium bis(fluorosulfonyl)imide Poly(ethylene oxide); Solid polymer electrolytes; Lithium polymer battery; IONIC-CONDUCTIVITY; ELECTROCHEMICAL PROPERTIES; COMPOSITE ELECTROLYTES; BATTERY DEVELOPMENT; NEGATIVE ELECTRODE; POLYETHYLENE OXIDE; THERMAL-PROPERTIES; PHASE-DIAGRAMS; PEO; TRANSPORT;

D O I：

10.1016/j.electacta.2014.04.099

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

New solid polymer electrolytes (SPEs) comprising of lithium bis(fluorosulfonyl)imide (LiFSI) and high molecular weight poly(ethylene oxide) (PEO, M-v =5 x 10(6) g mol(-1)) have been prepared and characterized, and are comparatively studied with the representative SPEs, Li[N(SO2CF3)(2)](LiTFSI)/PEO, at a molar ratio of EO/Li+ = 20. Their physicochemical properties have been investigated in terms of phase transition behavior, ionic conductivity, lithium-ion transference number (t(Li)(+)), electrochemical stability, and with particular attention to the interfacial behavior between lithium electrode and SPEs. It has been demonstrated that the ionic conductivities of LiFSI/PEO electrolyte are higher than those of LiTFSI/PEO one above 60 degrees C, and exceeds 10(-3) S cm(-1) at 80 degrees C. The interface resistances of Li symmetric cell (Li metal I polymer electrolytes vertical bar Li metal) using LiFSI/PEO electrolyte are much lower than those using LiTFSI/PEO. The Li/LiFePO4 cell using LiFSI/PEO electrolyte exhibits good cycling performance at 80 degrees C. These outstanding properties of the LiFSI/PEO electrolyte make it attractive as SPEs for Li battery. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：529 / 538

页数：10

共 69 条

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