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Shanshan Yan¹, Jinjia Liu^2,3, Zhenni He¹

¹Institute of Condensed Matter and Nanoscience (IMCN), Université catholique de Louvain, Place L. Pasteur 1, 1348, Louvain-la-Neuve, Belgium.

Angewandte Chemie (International ed. in English)

|February 24, 2025

概括

研究人员使用交叉连接的聚甲网络开发了一种新的离子凝电解质. 这种设计增强了离子迁移和转移数,这对于先进的电池应用至关重要.

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:

离子凝电解质是由聚合物矩阵与离子液体和盐一起膨胀形成的.
增加的离子度往往会降低离子转移数,这是由于离子捕获.
高离子迁移效率和转移数对于离子凝应用至关重要.

研究的目的:

设计一种具有增强离子传输功能的电解质离子凝.
为了提高离子凝电解质中的离子转移数 (t_Li⁺).
调查竞争协调对离子流动性的影响.

主要方法:

合成了一个交叉连接的聚甲网络.
将离子液体和盐纳入网络.
利用竞争性协调原理来最大限度地减少离子结合能量.
在 - 对称电池和NMC622红黑色Li电池中制造和测试了离子凝电解质.

主要成果:

在20°C时达到2.2×10-3 S cm-1的离子导电率和0.45的t Li+ .
在-对称细胞中,经过2000小时的稳定循环.
在NMC622红色电池中表现出良好的速率性能和循环稳定性 (在300个循环中每周期损失0.03%的容量).

结论:

设计的交联聚酸离子凝促进了高效的离子迁移和释放.
这种方法为开发高性能离子凝电解质提供了新的战略.
这些发现为优化储能应用的离子传输提供了洞察力.

关键词:

竞争力协调协调竞争力动态交叉链接的多酸.离子凝电解质电解质

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