超快的策略是为高性能硫电池制造硫阴极
Kun Liu1,2, Huimin Yuan1,2, Xinyang Wang1,2
1Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
ACS applied materials & interfaces
|June 26, 2023
概括
这项研究介绍了一种新的,超快的30秒微波辅助方法,用于为硫电池准备S-NiS2@SP@Bitu阴极材料. 这种新材料有效地抑制了聚硫化物穿,提高了电池的性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫 (Li-S) 电池具有高的理论能量密度,但受到聚硫化物穿效应和不良循环稳定性的影响.
- 开发高效的硫阴极材料对于推进Li-S电池技术至关重要.
研究的目的:
- 开发一种超快速和有效的方法来制备用于Li-S电池的新型硫阴极材料.
- 研究准备材料减轻聚硫化物转运和提高电化学性能的机制.
主要方法:
- 使用微波处理快速 (30秒) 合成S-NiS2@SP@Bitu从,硫,Super P和甲酸盐的阴极材料.
- 描述了材料的结构及其与多硫化物相互作用.
- 使用合成的阴极材料评估了Li-S电池的电化学性能.
主要成果:
- 通过选择性微波加热实现了S-NiS2@SP@Bitu阴极材料的超快合成.
- 证明NiS2@SP@Bitu与聚硫化物形成键,促进吸附并加速Li2S转化.
- S-NiS2@SP@Bitu阴极表现出极好的速率性能 (518.6 mAh g-1 在4C) 和稳定的循环.
- 实现了4.6 mAh cm-2的面积容量,硫载荷为4.8 mg cm-2.
结论:
- 微波辅助方法为正极材料提供了同时准备和硫加载的方法.
- S-NiS2@SP@Bitu阴极有效地抑制了穿效应,导致Li-S电池的优越电化学性能.
- 这种创新方法对于可扩展生产先进的硫阴极材料,用于下一代储能,具有显著的前景.
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