快速的多硫化物转换催化和可逆的阳极操作通过单一的阴极修饰器在金属无阳极硫电池中
Yun Zhao1,2, Limin Huang2, Dan Zhao1
1Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore, Singapore.
Angewandte Chemie (International ed. in English)
|July 21, 2023
概括
一种新型的化 (In2Se3) 添加剂通过改善阴极动力学和阳极沉积来增强可充电硫 (Li-S) 电池. 这种单添加方法提高了电池的性能和寿命.
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:
- 可充电硫 (Li-S) 电池面临商业化障碍,原因是阴极反应动力学缓慢,阳极沉积/剥离可逆性差.
- 当前的解决方案通常涉及阳极和阴极的单独添加剂,增加复杂性.
- 开发一种解决这两个问题的单一添加剂对于推进Li-S电池技术至关重要.
研究的目的:
- 调查单一阴极修饰剂,化 (In2Se3) 的有效性,同时解决Li-S电池性能方面的关键挑战.
- 探索In2Se3提高硫阴极动力学和阳极可逆性的机制.
- 在实际的Li-S电池配置中验证性能提升.
主要方法:
- 在Li-S电池的阴极中使用化 (In2Se3) 作为单个添加剂.
- 通过溶解的Se和In离子在阳极上分析了新型固体电解质接口 (LiInS2/LiInSe2) 的形成.
- 测试了经过修改的无极Li-S电池的性能,具有高Li2S负载和低电解质比率.
主要成果:
- 添加剂In2Se3有效催化了多硫化物在阴极上的反应.
- 在现场形成的LiInS2/LiInSe2固体电解质接口显著改善了阳极上的沉积/剥离可逆性.
- 经过修改的电池在0.2°C的160个周期中保持了60%的容量,平均库伦比效率为98.27%.
结论:
- 单一阴极添加剂In2Se3可以同时提高Li-S电池中的阴极反应动力学和阳极沉积可逆性.
- 在现场形成保护性固体电解质接口是改善阳极性能的关键.
- 这种方法为推进高性能Li-S电池的商业化提供了简化和有效的策略.
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