A new solid polymer electrolyte incorporating Li10GeP2S12 into a polyethylene oxide matrix for all-solid-state lithium batteries

被引:377
作者
Zhao, Yanran [1 ,2 ]
Wu, Chuan [1 ]
Peng, Gang [2 ]
Chen, Xiaotian [2 ]
Yao, Xiayin [2 ]
Bai, Ying [1 ]
Wu, Feng [1 ]
Chen, Shaojie [2 ]
Xu, Xiaoxiong [2 ]
机构
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Environm Sci & Engn, Beijing 100081, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Solid polymer electrolyte; Polyethylene oxide; Sulfide lithium superionic conductor; Positive effect; All-solid-state lithium battery; TRANSPORT-PROPERTIES; IONIC-CONDUCTIVITY; RECHARGEABLE BATTERIES; LITHIUM/POLYMER CELLS; DENDRITIC GROWTH; FILLER; SYSTEM;
D O I
10.1016/j.jpowsour.2015.09.111
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Li10GeP2S12 (LGPS) is incorporated into polyethylene oxide (PEO) matrix to fabricate composite solid polymer electrolyte (SPE) membranes. The lithium ion conductivities of as-prepared composite membranes are evaluated, and the optimal composite membrane exhibits a maximum ionic conductivity of 1.21 x 10(-3) S cm(-1) at 80 degrees C and an electrochemical window of 0-5.7 V. The phase transition behaviors for electrolytes are characterized by DSC, and the possible reasons for their enhanced ionic conductivities are discussed. The LGPS microparticles, acting as active fillers incorporation into the PEO matrix, have a positive effect on the ionic conductivity, lithium ion transference number and electrochemical stabilities. In addition, two kinds of all-solid-state lithium batteries (LiFeO4/SPE/Li and LiCoO2/SPE/Li) are fabricated to demonstrate the good compatibility between this new SPE membrane and different electrodes. And the LiFePO4/Li battery exhibits fascinating electrochemical performance with high capacity retention (92.5% after 50 cycles at 60 degrees C) and attractive capacities of 158, 148,138 and 99 mAh g(-1) at current rates of 0.1 C, 0.2 C, 0.5 C and 1 C at 60 degrees C, respectively. It is demonstrated that this new composite SPE should be a promising electrolyte applied in solid state batteries based on lithium metal electrode. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:47 / 53
页数:7
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