核心外缺氧的Fe2O3多面体作为硫阴极的有效宿主
Jun Pu1, Ziyang Huang1, Jie Wang2
1Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
Chemical communications (Cambridge, England)
|December 1, 2023
概括
为硫电池开发了一种新的氧化铁和碳宿主材料. 这种材料增强了电化学反应,减少了性能衰减,提高了电池效率.
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) 电池在理论上具有很高的能量密度,但存在多硫化物穿效应等问题.
- 开发先进的主体材料对于提高Li-S电池性能和稳定性至关重要.
研究的目的:
- 设计和合成一个富含氧缺陷的核心外Fe2O3-@C多面体硫宿主.
- 研究该材料促进电化学转化和减轻Li-S电池中穿效应的能力.
主要方法:
- 准备一个核心外Fe2O3-@C多面体结构.
- 对材料作为Li-S电池中的硫宿主进行电化学测试.
主要成果:
- Fe2O3-@C宿主有效地促进了Li-S细胞中的电化学转化.
- 该材料显著抑制了有害的航天飞机效应.
- 该Fe2O3-@C@S复合材料的初始容量高达1395 mA hg-1.
- 实现了每周期约0.067%的低容量衰减率.
结论:
- 富含氧缺陷的Fe2O3-@C核心外结构是高性能Li-S电池的有希望的宿主材料.
- 该材料的设计有效地解决了Li-S电池技术的关键挑战,从而提高了稳定性和容量保留.
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