一种具有成本效益的硫化物固体电解质Li7P3S7.5O3.5,密度低,阳极兼容性优异
Hui Li1, Qiaosong Lin2, Jinzhu Wang1
1Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.
Angewandte Chemie (International ed. in English)
|June 30, 2024
概括
一种新的Li7P3S7.5O3.5固体电解质为全固态Li电池提供了一个具有成本效益和低密度的解决方案. 它表现出极好的阳极兼容性和稳定的循环性能,为商业化铺平了道路.
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:
- 全固态电池 (ASSLB) 的商业化需要具有成本竞争力,低密度和阳极兼容性的固体电解质.
- 现有的氧化物,硫化物和化物固体电解质不能同时满足这些关键要求.
- 阳极兼容性至关重要,而阴极兼容性可以通过既定的涂层技术来解决.
研究的目的:
- 为ASSLBs设计和合成一种新的固体电解质材料.
- 评估新材料的成本,密度,阳极兼容性和电化学性能.
- 评估开发的固体电解质在商业ASSLB应用中的潜力.
主要方法:
- 合成Li7P3S7.5O3.5 (LPSO) 固体电解质,使用具有成本效益的原材料 (不包括昂贵的Li2S).
- 描述LPSO的密度,并与现有的固体电解质进行比较.
- 电化学测试Li的电池LPSOLi对称电池和所有固态袋式电池与Si阳极.
主要成果:
- LPSO的原材料成本很低,为14.42美元/公斤,远低于商业化门.
- LPSO的低密度为1.70g/cm3,低于氧化物和化物电解质.
- 稳定循环在Li水晶LPSO水晶Li电池超过4200小时和89.29%容量保留在Si阳极囊细胞在60°C的200个循环后.
结论:
- 开发的Li7P3S7.5O3.5固体电解质同时满足ASSLB的成本,密度和阳极兼容性要求.
- LPSO表现出有希望的电化学稳定性和性能,使其成为下一代固态电池的可行候选人.
- 该材料的特性支持其具有成本效益高的商业化全固态电池的潜力.
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