Lithium sulfonate-based polyether gel polymer electrolytes with high ionicconductivity and uniform Li-ion transport for high-performance lithiummetal batteries

作     者：Zhenyuan Hu Ziying Liu Kai Liu Jinpeng Qin Wenfan Guo Weizhen Fan Yunfeng Zhang 胡振原;刘子莹;刘凯;秦金鹏;郭文凡;凡威震;张运丰

作者机构：Hydrogen Energy Technology Innovation Center for Hubei ProvinceFaculty of Material Science and ChemistryChina University of Geosciences(Wuhan)Wuhan 430074China School of Environmental StudiesChina University of Geosciences(Wuhan)Wuhan 430074China 

基　　金：supported by the National Key Research and Development Program of China (2018YFB1502903) the National Natural Science Foundation of China (21603197) the Natural Science Foundation of Hubei Province (2016CFB181) China University of Geosciences (Wuhan) for the program of Center for Advanced Energy Research and Technologies 

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

年 卷 期：2025年第68卷第2期

页      码：493-502页

摘      要：Lithium metal batteries (LMBs) using gelpolymer electrolytes with satisfactory theoretical capacity andlow cost hold great promise for high energy density storagesystems. However, the inherently unwanted polarizations anduncontrolled lithium dendrites resulting from inferior Li-iontransporting efficiency hinder the practical application ofconventional gel electrolytes. Herein, a highly conductivecomposite gel polymer electrolyte with effective Li-ion conducting channels is designed via swelling nanofibrous membrane, where the single-ion conducting polymer of lithiumsulfonate-based polyether (DEBS-Li) used as the Li-ion accelerator is combined with poly(vinylidene fluoride-hexafluoropropylene)P(VDF-HFP) matrix by the electrospinningtechnology. The DEBS-Li having rich sulfonic groups canpromote lithium salts dissociation via electrostatic interaction,thus expediting the ionic migration and enabling the as-developed gel electrolyte with high ionic conductivity (~1.58×10^(−3) S cm^(−1)) and lithium transference number (0.62) at 25℃.Such optimization of ionic transfer kinetics can highly delaythe nucleation time of lithium dendrite and significantly inhibit dendritic formation, which leads to a stable Li plating/stripping in the symmetrical battery over 250 h at1.5 mA cm^(−2). Benefiting from these advantages, the Li||LiFePO_(4)cell using the electrolyte realizes ultralong stable cyclingover 500 cycles at a high rate of 10 C with ~90% capacityretention. We believe this novel lithium sulfonate-basedpolyether gel polymer electrolyte has profound potential forpractical applications in high-performance LMBs.

主 题 词：gel polymer electrolyte fibrous membrane singleion conductor lithium metal battery 

学科分类：0808[工学-自动化类] 08[工学] 

核心收录：

D　O　I：10.1007/s40843-024-3220-5

馆 藏 号：203156599...