An all-in-one polymer electrolyte enabled by acrylate-grafted separator copolymerization for high-performance lithium metal batteries  

作　　者：Jie Liu Jinping Zhang Yansong Liu Ruiqi Zhao Nuo Xu Xingchen Song Yuhu Li Guolin Sun Yanfeng Ma Chenxi Li Hongtao Zhang Yongsheng Chen 

机构地区：[1]The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials,Institute of Polymer Chemistry,College of Chemistry,Nankai University,Tianjin 300071,China [2]State Key Laboratory of Elemento-Organic Chemistry,Nankai University,Tianjin 300071,China [3]Renewable Energy Conversion and Storage Center(RECAST),Nankai University,Tianjin 300071,China

出　　处：《Nano Research》2025年第4期238-246,共9页纳米研究(英文版)

基　　金：the National Natural Science Foundation of China(No.52090034);the National Key R&D Program of China(No.2020YFA0711500);the Beijing-Tianjin-Hebei Basic Research Cooperation Project(No.B24JCZXJC00360).

摘　　要：Polymer electrolytes featuring flexibility,processability,and compatibility with large-scale roll-to-roll fabrication processes have emerged as promising candidates for solid-state lithium metal batteries.Herein,we have designed and synthesized an all-in-one free-standing acrylate-grafted cellulose separator polymer electrolyte(ACSPE)through the copolymerization of acrylate-grafted cellulose separator(ACS).This synthetic strategy leverages the abundant hydroxyl groups in the cellulose separator,which are substituted with acryloyl chloride to form an acrylate-grafted separator.The resulting ACSPE exhibits a high ionic conductivity of 1.78×10^(-3) S·cm^(-1) at room temperature,improved oxidation stability(5.57 V),and enhanced mechanical strength(10.0 MPa),indicating its high compatibility with high-voltage cathode,Li metal anode,and scalable roll-to-roll production processes.Li|ACSPE|LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)cells exhibit a long stable cycle life of 1000 cycles at 0.5 C/1 C with capacity retention of 75.6%,achieving stable performance across a wide temperature range from 0 to 60℃.Furthermore,when paired with a 50μm thin Li foil,full cells using NCM811 cathode with a mass loading of 6 mg·cm^(-2) exhibit a high discharge capacity of 191.0 mAh·g^(-1) at 0.1 C and maintain excellent cycling stability with a retention rate of 93.3% after 100 cycles.This study provides valuable insights into the chemical modification and design strategies for improving the processability and performance of polymer-based solid-state batteries.

关 键 词：polymer electrolytes lithium metal batteries high-voltage long cycling 

分 类 号：TM912[电气工程—电力电子与电力传动]