在75Li2S·25P2S5固态电解质系统中提高了空气稳定性和导电性:Li7P3S11的作用
1School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK simon.hall@bristol.ac.uk.
RSC advances
|September 11, 2023
概括
用P2O5合固态电解质可增强离子导电性和空气稳定性. 优化的98(0.75Li2S·0.25P2S5) ·2P2O5玻璃陶显示了性能和耐用性的提高.
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:
- 兴奋剂是改善固态电解质特性的一个关键策略.
- 提高离子导电性和空气稳定性对于固态电池至关重要.
- 0.75Li2S·0.25P2S5系统是一个有前途的固体电解质材料.
研究的目的:
- 为了合成和描述P2O5合的玻璃陶电解质.
- 调查P2O5兴奋剂对离子导电性和空气稳定性的影响.
- 了解影响材料性能的结构和形态变化.
主要方法:
- 合成的两步球磨技术.
- 粉末X射线衍射,拉曼光谱和固态核磁共振用于表征.
- 扫描电子显微镜用于形态分析.
主要成果:
- 添加P2O5促进了Li7P3S11相的形成,增强了离子导电性.
- 98{0.75Li2S·0.25P2S5) ·2P2O5 (2PO) 样品的离子导电率比未使用剂的样品高3.6倍.
- 2PO表现出优越的空气稳定性,保持其离子导电性和在暴露在空气中的关键阶段.
结论:
- P2O5兴奋剂是一种有效的方法来提高基于Li2S-P2S5的固体电解质的离子导电性和空气稳定性.
- 由于其增强的特性,2PO组合显示出在固态电池中实际应用的潜力.
- 形成一个保护性S8层有助于提高杂电解质的空气稳定性.
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