A flexible composite solid electrolyte with a highly stable interphase for dendrite-free and durable all-solid-state lithium metal batteries

A flexible composite solid electrolyte with a highly stable interphase for dendrite-free and durable all-solid-state lithium metal batteries

作者:Zhang, DC (Zhang, Dechao)[ 1 ] ; Xu, XJ (Xu, Xijun)[ 1 ] ; Huang, XY (Huang, Xinyue)[ 2 ] ; Shi, ZC (Shi, Zhicong)[ 2 ] ; Wang, ZS (Wang, Zhuosen)[ 1 ] ; Liu, ZB (Liu, Zhengbo)[ 1 ] ; Hu, RZ (Hu, Renzong)[ 1 ] ; Liu, J (Liu, Jun)[ 1 ] ; Zhu, M (Zhu, Min)[ 1 ]

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JOURNAL OF MATERIALS CHEMISTRY A

卷: 8 期: 35 页: 18043-18054

DOI: 10.1039/d0ta06697d

出版年: SEP 21 2020

文献类型:Article

摘要

Composite solid-state electrolytes (CSEs) that integrate the merits of different components are considered to be promising candidates for next-generation high-energy density lithium metal batteries. Herein, we have successfully designed a flexible CSE membrane consisting of the ceramic conducting Li1.3Al0.3Ti1.7(PO4)(3)(LATP) filler, polyethylene oxide (PEO) matrix, and 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (BMP-TFSI) ionic liquid. In particular, the addition of ionic liquid (BMP-TFSI) can not only decrease the interface impedance between the polymer and LATP ceramic fillers and improve the ionic conductivity, but also prevent the adverse reaction between Ti(4+)in LATP and Li metal and further enhance the interface stability. Benefitting from the synergistic effect of organic-inorganic hybrids, the obtained composite electrolyte membrane achieves an excellent ionic conductivity of 2.42 x 10(-4)S cm(-1)at 30 degrees C and a wide electrochemical stability window of 5 V (vs.Li+/Li). Moreover, the CSE membrane exhibits outstanding Li dendrite suppression capability, which is proved by galvanostatic Li plating/stripping tests for 1000 h. Assembled with this solid electrolyte membrane and a commercial LiFePO(4)cathode, all-solid-state lithium metal batteries demonstrate superior rate capability and outstanding cycling stability at both 30 and 45 degrees C. These results demonstrate that such a flexible composite electrolyte is a promising alternative electrolyte for practical high-energy density all-solid-state batteries.

关键词

KeyWords Plus:HIGH IONIC-CONDUCTIVITY; POLYMER ELECTROLYTE; LIQUID; SPECTROSCOPY; STABILITY; TRANSPORT

作者信息

通讯作者地址:

South China University of Technology South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.

通讯作者地址: Liu, J (通讯作者)

显示更多South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.

地址:

显示更多[ 1 ]‎ South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China

显示更多[ 2 ]‎ Guangdong Univ Technol, Guangdong Engn Technol Res Ctr New Energy Mat & D, Sch Mat & Energy, Guangzhou 510006, Peoples R China

电子邮件地址:msjliu@scut.edu.cn

基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China (NSFC)

51771076

51831009

National Natural Science Foundation of China (NSFC)

NSFC51621001

Guangdong Pearl River Talents Plan

2017GC010218

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出版商

ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND

期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Chemistry; Energy & Fuels; Materials Science

Web of Science 类别:Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary