井冈山大学学报（自然科学版）2025，Vol.46Issue(4)：38-47,10.DOI:10.3969/j.issn.1674-8085.2025.04.005
基于不同软段的自修复聚氨酯电解质的制备及电化学性能研究
PREPARATION AND ELECTROCHEMICAL CHARACTERISTICS OF SELF-HEALING POLYURETHANE ELECTROLYTES WITH DIFFERENT SOFT SEGMENTS FOR LITHIUM-ION BATTERIES
摘要
Abstract
During the use of lithium-ion batteries,the electrolyte materials are susceptible to repeated mechanical pressure,which inevitably leads to various degrees of microcracking,affecting the service life and safety of the batteries.Therefore,the production of self-healing polyurethane-based polymer electrolytes is a good method to solve this problem.However,the soft segments of polyurethane provide the channel structure for Lithium ion transport,and different soft segments have different solvation abilities.Therefore,two common polyols are selected for preparing two different self-healing gel polymer electrolytes(DAGPEs).It is found that the electrolyte material with poly(ethylene glycol)as the soft segment can realize self-healing within 30 min at 80℃ under the action of DA reversible covalent bond.Meanwhile,the ionic conductivity can be as high as 5.4×10-4 S/cm at room temperature.The assembled battery exhibits an initial specific capacity of approximately 141.4 mAh/g at 0.1 C,maintaining a capacity retention of 98％after 50 cycles.关键词
聚氨酯/凝胶聚合物电解质/自修复/电化学Key words
polyurethane/Gel polymer electrolyte/self-healing/electrochemistry分类
信息技术与安全科学引用本文复制引用
耿亭青,王雅宁,赵汝山,王春花,白国梁,周学华,张涛,邓盛珏..基于不同软段的自修复聚氨酯电解质的制备及电化学性能研究[J].井冈山大学学报（自然科学版）,2025,46(4):38-47,10.基金项目
国家自然科学基金委青年科学基金项目(52302235) （52302235）
安徽省高等学校自然科学研究重大项目(2023AH040072) （2023AH040072）
