高温Li-S电池在局部高度电解质中的故障机制
Zixiong Shi1,2, Simil Thomas1,2, Georgian Melinte3
1Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
Angewandte Chemie (International ed. in English)
|September 26, 2025
概括
研究人员开发了一种用于高温硫 (Li-S) 电池的新电解质,克服了以前的局限性. 这一突破使电池在极端温度下能够稳定运行,为实际应用铺平了道路.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 传统的以太电解质限制了高温硫 (Li-S) 电池的性能,原因是热稳定性差和寄生反应.
- 局部化高度电解质 (LHCE) 是有前途的,但在高温 (HT) Li-S 电池中取得了有限的成功.
研究的目的:
- 在LHCE中调查HT Li-S电池的故障机制.
- 开发一种新型的电解质,以使Li-S电池在高温下稳定高效地运行.
主要方法:
- 在HT Li-S电池中分析硫氧化还原反应和电解质溶解化学.
- 基于二甲基乙烯基醇二乙烯的局部化中度电解质 (B-LMCE) 的开发.
- 用B-LMCE对Li-S电池进行电化学测试,其温度范围广泛 (0°C至80°C).
主要成果:
- 确定了慢反应动力学和高聚硫化物反应性作为HT Li-S电池的关键故障因素.
- 开发的B-LMCE证明了快速的阴极动力学和稳定的阳极/电解质接口.
- 带有B-LMCE的Li-S电池在60°C下实现了250多个循环,并在0°C至80°C期间表现出色.
- 证明了可以制造Ah级袋式电池的可行性.
结论:
- B-LMCE有效地解决了用于高温Li-S电池的传统电解质的局限性.
- 这项工作为设计用于极端温度应用的电解质提供了新的策略,推动了实用的Li-S电池的开发.
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