莫-奥双的阿吉罗电解质使稳定的全固态电池成为可能
Panlei Cao1,2, Jinghui Chen1,2, Jiejie Li1,2
1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|May 3, 2025
概括
这项研究为所有固态电池引入了Mo-O双硫化物固体电解质,显著改善了水分稳定性和金属兼容性. 优化的材料表现出增强的离子导电性和长期循环性能.
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:
- 硫化物固体电解质对于所有固态电池至关重要,这是由于其高离子导电性和机械性能.
- 实际应用受限于不良的水分稳定性和金属兼容性.
- 需要改进的固体电解质材料,用于更安全,更高效的电池.
研究的目的:
- 为了合成和表征Mo-O双化硫化 argyrodite电解质.
- 为了提高固体电解质的水分稳定性和电化学性能.
- 为了研究金属电池的接口特性和树抑制.
主要方法:
- 通过兴奋剂合成Li6P1-xMoxS5-3xO3xCl1+x硫化物电解质.
- 优化剂度和回火温度 (570°C).
- 电化学测试,包括离子导电量测量,循环稳定性和涂/剥离.
主要成果:
- 优化的Li6P0.95Mo0.05S4.85O0.15Cl1.05实现了3.97mS cm-1的离子导电性.
- 减少H2S气体生成 (0.58 cm-3 g-1) 和改善空气稳定性.
- 证明了卓越的界面兼容性,抑制了树突 (1.51 mA cm-2 临界电流密度) 和5600小时的稳定/脱落.
- 在LiCoO2/电解质/电池1000个循环后实现了90.3%的容量保留.
结论:
- -O双剂有效地提高了硫化物固体电解质的水分稳定性和电化学特性.
- 优化的电解质显示出出色的界面兼容性和树突抑制能力.
- 这些发现为实用,高性能全固态电池铺平了道路.
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