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硫酸功能化MOF用于具有增强速率能力的Li-S电池
Avery E Baumann1, Xu Han1, Megan M Butala2,3
1Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States.
Journal of the American Chemical Society
|October 11, 2019
概括
金属有机框架 (Zr-MOF) 在它们的毛孔内稳定反应性二酸盐 (Li3PS4). 这通过提高硫利用率和聚硫化物封装来提高硫电池的性能.
科学领域:
- 材料科学
- 电化学
- 纳米技术
背景情况:
- 金属有机框架 (Zr-MOF) 提供了特殊的稳定性和调节性质.
- 在Zr-MOF中存在缺陷,
- 硫酸 (Li3PS4) 是硫电池的一个有前途但有反应性的材料.
研究的目的:
- 使用缺陷部位在Zr-MOF中稳定反应性硫酸盐 (Li3PS4).
- 通过这种新功能来提高硫电池的性能.
- 探索创建先进复合材料的新策略.
主要方法:
- 使用Li3PS4进行Zr-MOF的战略功能化.
- 使用NMR,XPS,拉曼光谱和X射线对分布函数分析进行表征.
- 电化学循环测试以评估电池的性能.
主要成果:
- 在Zr-MOF中成功稳定和整合Li3PS4.
- 在Li-S电池中提高硫利用和聚硫化封装.
- 即使在滥用循环条件下,也提高了容量保留和稳定性.
结论:
- 复合材料的协同性能超过了其单独的组件.
- 这种功能化战略为设计先进的储能材料提供了新的途径.
- 这种方法可以将多种化学成分组合起来,以适应特定的应用.
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