电解质
分离器(采油)
材料科学
热稳定性
复合数
离子电导率
化学工程
聚合物
聚烯烃
离子
复合材料
化学
电极
有机化学
物理
物理化学
图层(电子)
工程类
热力学
作者
Xiu Shen,Texiong Hu,Yuejing Zeng,Xiao Hu,Peng Zhang,Jinbao Zhao
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-07-01
卷期号:169 (7): 070505-070505
被引量:3
标识
DOI:10.1149/1945-7111/ac79d5
摘要
The commercial electrolyte of lithium-ion batteries (LIBs) is usually liquid state supplemented by a porous polyolefin separator to prevent short circuit. Recent years, polymer electrolyte shows great potential for its flexibility and enhanced safety. And novel single-ion conductor gel polymer electrolyte (SIGPE) could effectively suppress the anion polarization by immobilizing anions on the polymer bone. Further enhancing the thermal stability of SIGPE plays a significant role for the safety of the LIBs. Herein, a novel bifunctional core–shell structured composite was prepared, consisting of thermal stable polyimide as core and a composite single-ion conductor polymer. The relations of fiber morphology with spinning parameters and heat-treatment temperature were studied carefully. As a result, the composite core–shell structured membrane shows excellent high dimensional thermal stability up to 190 °C. Moreover, when the charged half battery was stored at 150 °C, the core–shell structured SIGPE cell shows excellent potential stability while ordinary cell quickly short out, greatly enhancing the safety of the LIBs. The ionic conductivity of the plasticized gel electrolyte could reach 1.7*10 −5 S cm −1 with a Li-ion transference number of 0.76. The assembled LiFePO 4 battery shows stable cycle performance and remained 85% capacity after 100 cycles.
科研通智能强力驱动
Strongly Powered by AbleSci AI