电子定位使得长周期硫化物为基础的全固态电池成为可能.
Dewen Wang1, Chong Liu1, Ruoyu Wang1
1Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
Angewandte Chemie (International ed. in English)
|February 25, 2025
概括
研究人员通过修改硫化物电解质,开发了稳定的固态电池的新策略. 这种电子定位方法提高了空气稳定性,并防止了树的生长,从而使电池的性能持久.
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
- 固态化学 固态化学
背景情况:
- 基于阿吉罗的硫化物电解质为固态金属电池提供高离子导电性.
- 硫化物电解质和阳极之间的界面反应和树生长限制了实际应用.
研究的目的:
- 通过调节轨道杂交,提高Li6PS5Cl硫化物电解质的稳定性.
- 在全固态金属电池中抑制界面反应和树突形成.
主要方法:
- 将 (Y) 和氧 (O) 纳入Li6PS5Cl结构以调节d-p轨道杂交.
- 研究Y和O对电子结构和接口特性的影响.
- 制造和测试对称的Li电池和全固态电池.
主要成果:
- 的结合增强了马德隆的能量,并诱导了硫原子上的电子定位,减少了与硫的相互作用.
- 引入氧气增强了空气的稳定性,并促进了Li2O保护间相在现场形成.
- 修改后的电解质使得在对称的电池中稳定的涂/剥离能够持续超过4800小时.
- 所有固态电池在0.5°C的1300个循环后显示出100%的容量保留.
结论:
- 通过轨道杂交的电子定位是稳定基于硫化物固态电池的有效策略.
- 修改了Y和O的Li6PS5Cl电解质为下一代电池中的超稳定接口提供了一个有希望的途径.
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