Double-Network Ionogel Electrolyte with Superior Mechanical Performance and High Safety for Flexible Lithium-Ion Batteries

时间:2022-07-05作者:浏览量:29


Double-Network Ionogel Electrolyte with Superior Mechanical Performance and High Safety for Flexible Lithium-Ion Batteries

作者:

Li, Z (Li, Zhen) [1] ; Chu, L (Chu, Lin) [2] , [3] ; Li, SL (Li, Suli) [2] , [3] ; Chen, WP (Chen, Weiping) [2] , [3] ; Li, ZY (Li, Ziyong) [2] ; Guo, PL (Guo, Panlong) [2] , [3] ; Hu, RZ (Hu, Renzong) [2]

CHEMELECTROCHEM

卷9

期11

文献号e202200337

DOI10.1002/celc.202200337

出版时间JUN 14 2022

已索引2022-06-17

文献类型Article

摘要

The development of high-performance solid-state electrolytes to replace conventional liquid organic electrolytes has received intensive attention because of the improvements in the safety, flexibility, reliability, and cycling stability of lithium-ion batteries (LIBs). In this work, we present a double-network ionogel electrolyte (DNIE) through the preparation of interpenetrating polymer networks (IPNs). This DNIE exhibits good mechanical properties, excellent flexibility, nonflammability, high ionic conductivity (4.13x10(-4) S cm(-1) at room temperature), electrochemical stability (>4.8 V), and the ability to suppress Li dendrite formation. The Li/LiFePO4 cell assembled with the DNIE exhibits superior cycling performance while also delivering a steady high discharge capacity of 133.7 mAh g(-1) and a Coulombic efficiency of 99.8 % after 220 cycles at a charge/discharge rate of 0.2 C. Importantly, the DNIE(200 %)-20 % electrolytes can be prepared on the surface of graphite anodes through in situ gelling, which can improve the stability of the active layer and the adhesion between the active layer and current collector in mechanical bending at different angles. After assembling into soft-packed batteries in the configuration of LiCoO2|DNIE(200 %)-20 %|graphite via the in situ gelling of DNIE(200 %)-20 % on the surface of the graphite electrode, the flexible batteries showed excellent cycling stability (capacity retention >98 %) even when folded more than 100 times.


关键词

作者关键词double-networkflexible batteryionogel electrolytesnonflammabilitysolid-state electrolyte

Keywords PlusCHALLENGES

作者信息

通讯作者地址

Guo, Panlong;

Hu, Renzong

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

通讯作者地址

Guo, Panlong

(通讯作者)

Zhuhai CosMX Battery Co Ltd, Zhuhai 519000, Peoples R China

地址

1 Beijing Inst Technol, Sch Mat & Environm, Zhuhai 519085, Peoples R China

2 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

3 Zhuhai CosMX Battery Co Ltd, Zhuhai 519000, Peoples R China

电子邮件地址guopanlong1989@163.commsrenzonghu@scut.edu.cn

类别/分类

研究方向Electrochemistry