基于的储能设备的金属有机框架:利用再氧化添加剂显著提高性能
Puja De1, Surbhi Priya2, Joyanti Halder1
1Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
ACS applied materials & interfaces
|May 11, 2024
概括
研究人员开发了一种用于离子电池 (AIB) 的新方法,使用氧化还原添加剂电解质和ZIF 67框架. 这种方法显著提高了排放能力和循环稳定性,改善了AIB的业绩.
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:
- 离子电池 (AIB) 的缓慢动力学限制了性能.
- 目前的策略,如形态调整提供有限的改进.
研究的目的:
- 通过解决动力局限性来提高AIB的性能.
- 引入一种使用氧化还原添加剂和先进框架材料的新方法.
主要方法:
- 使用ZIF 67,一个多孔的框架材料,以促进离子扩散.
- 在水性化电解质中加入铁化物作为氧化还原添加剂.
- 组装的基于Al-ion的BatCap设备,采用ZIF 67阴极和衍生的多孔碳阳极.
主要成果:
- 在0.2 A g-1下实现了288 mAh g-1的超级放电容量,具有强大的循环稳定性.
- 经过氧化还原添加剂修改,显著提高了特定容量和循环稳定性.
- 组装的 BatCap 设备显示能量密度为 86 Wh kg-1 在 2 KW kg-1 处.
结论:
- 氧化还原添加剂改性电解质和ZIF 67框架的组合有效地克服了AIBs中的动力限制.
- 与之前报告的水系统相比,开发的AIB显示出更高的性能.
- 现场表征阐明了氧化还原添加剂在提高AIB性能方面的机制.
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