化物对高容量全固态电池的电极电解质双功能材料的影响
Tatsuki Shigedomi1, Yushi Fujita1, Kota Motohashi1
1Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
ACS applied materials & interfaces
|April 11, 2024
概括
研究人员使用机械化学过程开发了新的全固态电池材料. Li2S-V2S3-LiI系统展示了优越的容量和稳定的性能,为更安全,高能量密度的电池铺平了道路.
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:
- 全固态电池 (ASSB) 与传统的离子电池相比,具有较高的能量密度和安全优势.
- 基于硫化物的材料对ASSB是有前途的,因为它们的高容量和离子导电性.
- 开发稳定的电极-电解质双功能材料对于推进ASSB技术至关重要.
研究的目的:
- 在Li2S-V2S3-LiX系统中合成新型电极-电解质双功能材料 (X = F, Cl, Br, I).
- 研究添加化对这些材料电化学性质的影响.
- 为了评估高负载ASSB使用优化材料组成的性能.
主要方法:
- 机械化学合成Li2S-V2S3-LiX材料. 这是一个非常好的方法.
- 电化学表征包括容量,导电性和循环性能测试.
- 高负载ASSB电池的制造和测试.
主要成果:
- 该Li2S-V2S3-LiI电极材料实现了最高的可逆容量400 mAhg-1.1.
- 高可逆容量归因于在深充电状态下保持的离子导电性,而不仅仅是初始导电性.
- 使用Li2S-V2S3-LiI的高负载电池 (37.3 mg cm−2) 在60°C时表现出~11.5 mAh cm−2的面积容量,具有良好的循环稳定性.
结论:
- 机械化学合成Li2S-V2S3-LiX材料是有效的创建电极-电解质双功能组件.
- Li2S-V2S3-LiI表现出卓越的电化学性能,特别是在循环下保持离子导电性.
- 开发的Li2S-V2S3-LiI材料对实用,高能量密度的全固态电池具有重大前景.
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