Novel Quasi Solid-State Succinonitrile-based Electrolyte with Low-flammability for Lithium-ion Battery  

作　　者：Yan-Kun Xie Lu-Kun Feng Dong-Dong Li Yin Tang Cai-Zhen Zhu Ming-Liang Wang Jian Xu 

机构地区：[1]Institute of Low-Dimensional Materials Genome Initiative,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,China

出　　处：《Chinese Journal of Polymer Science》2023年第11期1695-1705,I0005,共12页高分子科学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52003160 and 51973118);Guangdong Basic and Applied Basic Research Foundation(No.2020A1515010644);Key-Area Research and Development Program of Guangdong Province(Nos.2019B010929002 and 2019B010941001);the Science and Technology Innovation Commission of Shenzhen(No.JCYJ20190808150001775);the Program for Guangdong Introducing Innovative and Entrepreneurial Teams(No.2019ZT08C642)。

摘　　要：Quasi solid-state succinonitrile(SN)-based polymer electrolytes have emerged for lithium-metal batteries due to their excellent ionconductivity at room temperature,wide electrochemical stability window(ESW,usually>5 V).However,the practical application of these solid SN-based polymer electrolytes is hampered by the flammability and the inherent instability of SN to Li-metal anode.In this work,solid SN-based polymer electrolytes were prepared with succinonitrile,ethoxylated trimethylolpropane triacrylate(ETPTA),triethyl phosphate(TEP)and fluoroethylene carbonate for Li-metal battery via in situ polymerization method.The SN-based polymer electrolytes with 5 wt%triethyl phosphate and FEC showed good nonflammability,superior ion-conductivity as high as 1.01×10^(-3)S/cm,and wide ESW of 5.41 V.This SN-based polymer electrolyte also exhibited excellent interfacial compatibility to lithium metal anode.And it also delivered a high specific capacity of 156m Ah/g at 0.2 C at ambient temperature,and presented stable cycling at 1.0 C with a specific capacity retention of 98.4%after 1000 cycles.This work provides an alternative and simple strategy to realize the practical application of the solid-state SN-based polymer electrolyte.

关 键 词：Solid polymer electrolyte SUCCINONITRILE Solid-state battery In situ polymerization Low-flammability 

分 类 号：O646.1[理学—物理化学] TM912[理学—化学]