作为恢复硫化物固体电解质的功能添加剂的普鲁士蓝模拟:提高全固态电池的水分稳定性
Sumin Ko1, Hyebin Jeong2, Changshin Jo1,2
1Department of Battery Engineering, Graduate Institute of Ferrous & Eco Materials, Pohang University of Science and Technology, 77 Cheongam-ro, Pohang, Gyeongbuk, 37673, Republic of Korea.
Advanced materials (Deerfield Beach, Fla.)
|October 21, 2025
概括
普鲁士蓝色类似物 (PBA) 提高了全固态电池 (ASSB) 的硫化物固态电解质 (SSE) 的水分稳定性. 这些添加剂不仅可以防止,而且还可以逆转降解,恢复电池性能并使其稳定运行.
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
- 电池技术 电池技术
背景情况:
- 硫化物固态电解质 (SSEs) 对全固态电池 (ASSB) 是有前途的.
- SSEs对水分的敏感性阻碍了实际应用和长期稳定性.
- 制定有效的策略来缓解潮湿引起的降解至关重要.
研究的目的:
- 在SSEs中引入普鲁士蓝色类似物 (PBA) 作为功能添加剂.
- 研究PBAs在增强水分稳定性和电化学性能方面的作用.
- 探索PBA介导的降解抑制和恢复背后的机制.
主要方法:
- 将PBA纳入硫化物SSE中的方法.
- 带有PBA的SSE暴露在潮湿的条件下.
- 包含PBA的ASSB的电化学测试.
- 分析PBA结构和与水和气体的相互作用.
主要成果:
- PBAs有效地抑制SSEs的潮湿诱导的降解.
- PBA 具有独特的恢复功能,可以恢复退化的 SSE 的性能.
- 在降解后的SSE中混合后的PBA在500个循环中实现了99.9%的库伦比效率.
- PBA吸收水和H2S,保持离子导电性和接口特性.
结论:
- PBA是硫化物SSE的多功能添加剂,提供保护和恢复.
- 在环境条件下组装的PBA可实现稳定且耐用的ASSB.
- 这项工作提出了一个可行的策略,以克服ASSB中的水分相关挑战.
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