Enhancing the ionic conductivity in a composite polymer electrolyte with ceramic nanoparticles anchored to charged polymer brushes  

作　　者：Bintao Zhao Xi Lu Qian Wang Jingfa Yang Jiang Zhao Henghui Zhou 

机构地区：[1]College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China [2]Pulead Technology Industry Co.Ltd.,Beijing 102200,China [3]Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2020年第3期831-835,共5页中国化学快报（英文版）

基　　金：financially supported by PULEAD Technology Industry Co.,Ltd.;the National Natural Science Foundation of China(Nos.21771018,21875004)。

摘　　要：Polymer electrolytes a re essential for next-gene ration lithium batteries because of their excellent safety record.However,low ionic conductivity is the main obstacle restricting their commercial application.Composites with nanoparticles are a promising route to overcome this obstacle.In this work,lithium polystyrene sulfonate brushes(LiPSS)is anchored to silicon dioxide nanoparticles with chemical bonding using atom transfer radial polymerization(SI-ATRP).The composite polymer electrolytes are made by mixing vinylene carbonate and nanoparticles via a facile in situ polymerization process.The ionic conductivity of composite polymer electrolytes is improved to 7.2×10^-4 S/cm at room temperature,which is attributed to the low degree of crystallinity of polymer electrolyte and the fast ion transport on the surfaces of polymer brush layers that act as a conductive network.The composite polymer electrolytes show a wide electrochemical window of approximately 4.5 V vs.Li^+/Li and excellent cycling performance retention of approximately 95%after 100 cycles at ambient temperature.The results also prove that surface groups of ceramic na noparticles are an important way to increase the electrochemical properties of composite polymer electrolytes.

关 键 词：POLYMER ELECTROLYTE POLYMER BRUSHES Solid batteries NANOPARTICLES Composite ELECTROLYTE 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.1[理学—物理化学] O631[理学—化学]