“Polymer-in-ceramic” based poly(ε-caprolactone)/ceramic composite electrolyte for all-solid-state batteries  

作　　者：Bohao Zhang Yulong Liu Jia Liu Liqun Sun Lina Cong Fang Fu Alain Mauger Christian M.Julien Haiming Xie Xiumei Pan 

机构地区：[1]National&Local United Engineering Laboratory for Power Battery,Department of Chemistry,Northeast Normal University,Changchun 130024,Jilin,China [2]Institut de Minéralogie,de Physique des Matériaux et de Cosmochimie(IMPMC),Sorbonne Université,CNRS UMR 7590,4 Place Jussieu,75005 Paris,France

出　　处：《Journal of Energy Chemistry》2021年第1期318-325,I0010,共9页能源化学（英文版）

基　　金：supported by the National Key R&D Program of China (2016YFB0100500);Special fund of key technology research and development projects (20180201097GX) (20180201099GX) (20180201096GX) (20190302130GX);Jilin province science and technology department. The R&D Program of power batteries with low temperature and high energy, Science and Technology Bureau of Changchun (19SS013);Key Subject Construction of Physical Chemistry of Northeast Normal University。

摘　　要：Inspired by the concept of "polymer-in-ceramic",a composite poly(ε-caprolactone)(PCL)/ceramic containing LiTFSI is prepared and investigated as a solid electrolyte for all-solid-state batteries.The composite with the optimum concentration of 45 wt% LiTFSI and 75 wt% Li1.5Al0.5Ge1.5(PO4)3(LAGP,NASICON-type structure) exhibits a high ionic conductivity(σi=0.17 mS cm-1) at 30℃,a transference number of 0.30,and is stable up to 5.0 V.The composite electrolyte is a flexible and self-standing membrane.Solid-state LiFePO4//Li batteries with this composite electrolyte demonstrate excellent cycling stability with high discharge capacity of 157 mA h g-1,high capacity retention of 96% and coulombic efficiency of 98.5% after 130 cycles at 30℃ and 0.1 C rate.These electrochemical properties are better than other PCL-based allsolid-lithium batteries,and validate the concept of "polymer-in-ceramic" by avoiding the drawback of lower conductivity in prior "polymer-in-ceramic" electrolyte at high concentration of the ceramic.

关 键 词：All-solid-state electrolyte Polymer-in-ceramic Poly(ε-caprolactone)/LAGP composite High fluorinated SEI layer 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]