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交互式有机-无机复合体接口可实现快速离子运输,低自放电和电池的稳定存储

Ping Li¹, Zhe Cheng¹, Yingke Zhou¹

¹The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, College of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, PR China.

Journal of colloid and interface science

|December 6, 2024

概括

一种新的有机-无机复合膜可以提高电池的性能. 这种保护层提高了/CFx电池中金属阳极的稳定性和长期存储.

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
储能储能储能储能储能储能

背景情况:

金属阳极对于高能电池至关重要,但其稳定性不佳,长期存储时间有限.
提高阳极的被动化和离子传输对于先进的电池应用至关重要.

研究的目的:

开发和评估一种有机-无机复合膜,用于被动化阳极.
为了提高Li/CFx电池的稳定性,高速率能力和长期存储性能.

主要方法:

在薄膜上制造有机-无机复合薄膜 (聚烯碳酸盐,LiTFSI,LLZNO) 通过螺旋涂层.
具有或没有复合膜涂层的Li/CFx电池的电化学测试.
使用理论计算,拉曼映射和凯尔文探针力显微镜 (KPFM) 的表征.

主要成果:

涂层Li/CFx电池表现出优越的放电能力 (1006.6 mAh/g在0.1C) 和高速率能力 (639.4 mAh/g在5C).
复合膜显著改善了长期储存,在55°C (60天) 后在0.1°C下保持521.7 mAh/g (1.87%的月度自放电).
膜有效地使阳极被动,增强离子通道,调节离子迁移,防止电解质腐蚀.

结论:

开发的有机-无机复合膜为提高阳极性能提供了一个简单且具有成本效益的策略.
这种方法显著提高了Li/CFx电池的高速率和长期存储能力.
复合膜的稳定性和离子导电性是克服阳极限制的关键.

关键词:

长期存储性能长期存储性能有机-无机复合膜是一种有机-无机复合膜.线涂层是一种线涂层.稳定的阳极是稳定的.表面被动化的表现.

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