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合理设计的化聚电解质,用于高速率,无树的金属电池

Yanxin Jiang^1,2,3, Liang Chai^1,2,3, Longjiang Deng^1,2,3

¹School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.

ACS applied materials & interfaces

|September 12, 2023

概括

一种新型的准固态电解质 (EFA-G) 提高了金属电池的性能. 这种基于聚合物的电解质提供了高导电性和稳定性,使长期循环和提高电池容量成为可能.

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
聚合物化学聚合物化学

背景情况:

高性能聚合物电解质对于下一代金属电池 (LMB) 来说至关重要.
开发稳定和导电电解质是克服当前电池限制的关键.

研究的目的:

为了合成和表征一种新型的准固态电解质 (EFA-G) 用于先进的LMB.
为了评估EFA-G电解质的电化学性能和稳定性.

主要方法:

皮罗利类型离子液体和聚合物的光启动自由基共聚合.
在溶解物离子液体的存在下进行合成,以产生EFA-G电解质.
电化学测试包括离子导电性,电化学稳定性窗口和对称和Li/LFP电池中的循环性能.

主要成果:

EFA-G 呈现出高离子导电性 (9.87 × 10-4 S cm-1) 和广泛的电化学稳定性窗口 (0-5.0 V 与 Li+/Li).
由于增强的Li+迁移和减少的离子流动性,改善了Li+运输号码 (0.33).
稳定的涂/剥离循环 (>1000小时) 和 Li/LFP 电池中的优异电池性能 (78.1 mA hg-1 在 8 C, >600 个循环).

结论:

开发的EFA-G电解质显示出高性能金属电池的巨大潜力.
电解质的设计,具有屏蔽效果和富含LiF的SEI,促进稳定的循环和增强的电池指标.
这项研究为设计以高分子为基础的先进电解质提供了有价值的见解,用于未来的储能应用.

关键词:

富有生命力的SEI.电静电屏蔽电静电屏蔽电静电屏蔽离子电池离子电池离子运输系统是离子运输系统.聚化聚合物中的多化聚合物.

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