A low cost composite quasi-solid electrolyte of LATP, TEGDME, and LiTFSI for rechargeable lithium batteries

doi:10.1088/1674-1056/26/6/068201

Abstract

The composite quasi solid state electrolytes (CQSE) is firstly synthesized with quasi solid state electrolytes (QSE) and lithium-ion-conducting material Li_1.4Al_0.4Ti_1.6(PO₄)₃ (LATP), and the QSE consists of[LiG4][TFSI] with fumed silica nanoparticles. Compared with LATP, CQSE greatly improves the interface conductance of solid electrolytes. In addition,it has lower liquid volume relative to QSE. Although the liquid volume fraction of CQSE drops to 60%, its conductivity can also reach 1.39×10^-4 s/cm at 20℃. Linear sweep voltammetry (LSV) is conducted on each composite electrolyte. The results show the possibility that CQSE has superior electrochemical stability up to 5.0 V versus Li/Li⁺¹. TG curves also show that composite electrolytes have higher thermal stability. In addition, the performance of Li/QSE/LiMn₂O₄ cells and Li/CQSE/LiMn₂O₄ is evaluated and shows good electrochemical characteristics at 60℃.

Keywords: quasi solid state electrolytes Li_1.4Al_0.4Ti_1.6(PO₄)₃ conductivities

Received: 15 March 2017
Revised: 05 April 2017
Accepted manuscript online:

PACS:	82.47.Aa	(Lithium-ion batteries)
	65.40.gk	(Electrochemical properties)
	82.45.Gj	(Electrolytes)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 52315206 and 51502334), the Funds from the Ministry of Science and Technology of China (Grant No. 2016YFB0100100), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09010000), and the Foundation from Beijing Municipal Science & Technology Commission (Grant No. D171100005517001).

Corresponding Authors: Hong Li
E-mail: hli@iphy.ac.cn

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Jie Huang(黄杰), Jia-Yue Peng(彭佳悦), Shi-Gang Ling(凌仕刚), Qi Yang(杨琪), Ji-Liang Qiu(邱纪亮), Jia-Ze Lu(卢嘉泽), Jie-Yun Zheng(郑杰允), Hong Li(李泓), Li-Quan Chen(陈立泉) A low cost composite quasi-solid electrolyte of LATP, TEGDME, and LiTFSI for rechargeable lithium batteries 2017 Chin. Phys. B 26 068201

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A low cost composite quasi-solid electrolyte of LATP, TEGDME, and LiTFSI for rechargeable lithium batteries

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