Nanophase separated,grafted alternate copolymer styrene-maleic anhydride as an efficient room temperature solid state lithium ion conductor

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外文摘要：All solid-state lithium metal batteries(ASSLMBs)based on polymer solid electrolyte and lithium metal anode have attracted much attention due to their high energy density and intrinsic safety.However,the low ionic conductivity at room temperature and poor mechanical properties of the solid polymer elec-trolyte result in increased polarization and poor cycling stability of the Li metal batteries.In order to improve the ionic conductivity at room temperature while maintaining mechanical strength,we com-bine the conductivity of short chain polyethylene oxide(PEO)and strength of styrene-maleic anhydride copolymer(SMA)to obtain a grafted block copolymer with nanophase separation structure,which has room temperature ionic conductivity up to 1.14×10-4 S/cm and tensile strength up to 1.4 MPa.Li||Li symmetric cell can work stably for more than 1500h under the condition of 0.1mA/cm2.Li||LiFePO4 full cells can deliver a high capacity of 151.4 mAh/g at 25℃ and 0.2 C/0.2 C charge/discharge condi-tions,showing 85.6% capacity retention after 400 cycles.Importantly,the all solid state Li||LiFePO4 pouch cell shows excellent safety performance under different abuse conditions.These results demonstrate that the nanophase separated,grafted alternate copolymer electrolyte has huge potential for application in Li metal batteries.

外文关键词：

Solid polymer electrolyteAll solid-state batteryLi metal batteryCopolymersNanophase separation

作者：

Qian Wang、Ting Gao、Xiwen Lu、Hangchao Wang、Minggui Xu、Longtao Ren、Zheng Chang、Wen Liu

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作者单位：

Institute of Science and Technology,China Three Gorges Corporation,Beijing 100038,China

State Key Laboratory of Chemical Resource Engineering,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,College of Chemistry,Beijing University of Chemical Technology,Beijing 100029,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBeijing University of Chemical TechnologyBeijing Municipal Natural Science Foundation-Xiaomi Innovation Joint Fundprogram"Research on key technologies of solidstate batteriesresearch and development of organicinorganic composite solidstat

项目编号：

217710182187500422108149buctrc201901L223011202103036

出版年：

2024

DOI：

10.1016/j.cclet.2023.108887

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(7)