Enhancing Li-ion conduction and mechanical properties via addition of fluorine-containing metal–organic frameworks in allsolid-state cross-linked hyperbranched polymer electrolytes

作     者：Wen Wen Qinghui Zeng Pingping Chen Xin Wen Zhenfeng Li Yu Liu Jiazhu Guan Anqi Chen Wei Liu Liaoyun Zhang Wen Wen;Qinghui Zen;Pingping Chen;Xin Wen;Zhenfeng Li;Yu Liu;Jiazhu Guan;Anqi Chen;Wei Liu;Liaoyun Zhang

作者机构：School of chemical sciencesUniversity of Chinese Academy of SciencesBeijing 100049China Research Institute of Petroleum Exploration&Development(RIPED)PetroChinaBeijing 100083China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第10期

页      面：8946-8954页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.52073285 and 11975238) the authors also express gratitude for the help from the analysis and testing center at the University of Chinese Academy of Sciences 

主　　题：hyperbranched cross-linked polymer electrolyte all-solid-state metal-organic frameworks composite lithium metal batteries 

摘      要：Poly(ethylene oxide)(PEO)-based solid polymer electrolytes(SPEs)are commonly used in lithium metal batteries(LMBs)for their good Li-salt solvating ability and easy ***,the relatively low Li-ion conduction ability hinders their further *** this work,a novel hyperbranched-polyether-type composite solid polymer electrolyte(CSPE)is prepared via a quick cross-linking reaction between aldehyde-terminated polyethylene glycol(PEG)and hyperbranched poly(ethylene imine)(HPEI)in the presence of lithium salt and fluorine-containing Zr-based metal–organic framework(MOF)UiO-66-(F)_(4).The hydrogen bonds between the fluorine atoms and amino groups in the electrolyte help to the better dispersion of UiO-66-(F)_(4) in the polymer matrix,which is beneficial to solving the problem of aggregation of ***,the CSPEs with the functional MOF fillers show improvements in both electrochemical and mechanical ***,the Li-ion transference number(t)is considerably enhanced from 0.23 to ***-solid-state LMBs based on the CSPE also present good cycling performances.A high specific discharge capacity of 141.4 mAh·g^(−1) is remained after 200 cycles at 0.2 *** study not only provides an effective synthesis method of the cross-linked hyperbranched polymer electrolyte,but also puts forward a new strategy for uniform dispersion of inorganic fillers in CSPEs.