铌酸锂调控固态电解质电场结构促进锂离子高效传输

作     者：刘晓潼 温博华 钟贵明 程醒 简翠英 郭勇 黄妍斐 马家宾 史沛然 陈立坤 张丹丰 吴士超 柳明 吕伟 贺艳兵 康飞宇 Xiaotong Liu;Bohua Wen;Guiming Zhong;Xing Cheng;Cuiying Jian;Yong Guo;Yanfei Huang;Jiabin Ma;Peiran Shi;Likun Chen;Danfeng Zhang;Shichao Wu;Ming Liu;Wei Lv;Yan-Bing He;Feiyu Kang

作者机构：Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research CenterInstitute of Materials Research(IMR)Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Laboratory of Advanced Spectro-electrochemistry and Li-ion BatteriesDalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Department of Mechanical EngineeringYork UniversityTorontoON M3J 1P3Canada Nanoyang GroupState Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China College of Materials Science and EngineeringShenzhen UniversityShenzhen 518055China 

出 版 物：《Science China Materials》 (中国科学（材料科学）（英文版）)

年 卷 期：2024年第67卷第6期

页      面：1947-1955页

核心收录：

学科分类：081704[工学-应用化学] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key Research and Development Program of China (2021YFF0500600) National Natural Science Foundation of China (No.U2001220) Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center (XMHT20200203006) Shenzhen Technical Plan Project (RCJC20200714114436091,JCYJ20220818101003007,and JCYJ20220818101003008) 

主　　题：lithium niobate solid-state electrolytes dielectric ceramics electric field regulation 

摘      要：聚合物基固态电解质得益于其易加工性,最有希望应用于下一代固态锂金属电池.目前,聚合物基态电解质的离子电导率提升策略多为加入导锂陶瓷以构建离子传输通道,其提升程度有限.电场在锂离子输运过程中存在重要影响,目前研究中有关电场对锂离子传输的影响机制尚不明确.本文将兼具高离子电导率和高介电常数的铌酸锂嵌入聚偏氟乙烯基体中,设计了一种新型复合固态电解质.铌酸锂颗粒有效调节电解质内部电场结构,增强了离子输运方向电场强度,实现了离子电导率的大幅提升(7.39×10^(-4)S cm^(-1),25℃).该电解质匹配高镍正极和锂金属负极的固态电池可稳定循环1000次以上,容量保持率为72%.该研究为设计下一代固态锂电池用高离子电导复合固态电解质提供了新的策略.