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一种单离子导电复合凝电解质,基于螺旋状半孔酸纳米纤维,用于高性能离子电池

Caiyuan Liu¹, Xin Fang¹, Hui Peng¹

¹Jiangsu Key Laboratory of Advanced Functional Polymer Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 PR China.

Journal of colloid and interface science

|February 6, 2025

概括

一种新的单离子导电凝聚合物电解质 (SCGE) 提高了离子电池的安全性和性能. 这种先进的材料有效地抑制了树突,从而提高了下一代电池的功率密度和稳定循环.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物科学聚合物科学

背景情况:

凝聚合物电解质 (GPEs) 旨在在离子电池 (LIB) 中结合安全性,离子导电性和接口兼容性.
单离子导电电解质对于防止树突和提高电池功率密度至关重要.
开发先进的GPE对于改善LIB的整体绩效至关重要.

研究的目的:

设计和合成一个单离子导电复合凝电解质 (SCGE).
为了提高LIBs的安全性,离子导电性和电极-电解质接口兼容性.
调查SCGE在高性能LIB应用中的潜力.

主要方法:

合成的螺旋半孔@多多巴胺-移植-盐 (SPL) 纳米纤维.
分散的SPL纳米纤维在一个聚乙烯化物-化) 矩阵中,以创建一个多孔的SCGE膜.
评估了SCGE的电化学性能,其电池配置分别为Li干SCGE干Li和LFP干SCGE干Li.

主要成果:

该SCGE膜表现出高液体电解质吸收率 (605%) 和高离子转移数 (t_Li+ = 0.94).
经过1000小时的循环运行后,LijiS3-CGEjiLi电池显示出极小的超电位 (0.1V).
该LFPgadgadgadS3-CGEgadgadgadLi电池提供了高的初始特定容量 (150.1mAhg^-1在0.1C) 和稳定的循环性能.

结论:

开发的SCGE显示了LIBs的优良性能,包括高安全性和离子导电性.
由于其单离子导电性质,SCGE有效地抑制了树的形成.
该SCGE显示出在高性能离子电池中实际应用的巨大潜力.

关键词:

复合凝电解质复合凝电解质螺旋式半孔的二氧化纳米纤维.离子电池是一种离子电池.单离子导体导体是一个单离子导体.

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