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在Graphite Felt上通过轻度蚀刻工程在Graphite Felt上的无形MnO₂的In Situ生长作为先进氧化还原流电池的强大催化剂

Xiaoyi Huangyang¹, Hongrui Wang², Weibin Zhou³

¹School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, P. R. China.

ACS applied materials & interfaces

|June 13, 2024

概括

研究人员在石墨上开发了无形二氧化 (AMO@GF),以提高氧化还原流电池 (VRFB) 的性能. 这种电极修改显著提高了大规模储能应用的能源效率和稳定性.

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:

氧化还原流电池 (VRFB) 由于成本,安全性和寿命,对大规模储能充满希望.
石墨 (GF) 是常见的电极,但对氧化还原反应具有有限的催化活性,阻碍了VRFB的效率.

研究的目的:

为了增强VRFB的石墨电极的催化活性.
通过电极修改来提高VRFB的能效和速率性能.

主要方法:

在石墨 (GF) 上使用快速蚀刻工艺 (5分钟) 在现场生长无形二氧化 (MnO2).
修改后的电极表面和催化性能的特征.
密度函数理论 (DFT) 计算以了解催化机制.

主要成果:

蚀刻过程在石墨上产生了多孔且有缺陷的表面,增加了活性部位.
无形MnO2作为VO2+/VO2+氧化还原对的有效催化剂.
带有修改后的AMO@GF电极的VRFB显示在200mA cm-2.0的2400个循环中提高了能源效率和稳定性.
实现了300 mA cm-2的最大电流密度.

结论:

开发的AMO@GF电极材料显著提高了VRFB的性能.
这种方便有效的电极设计策略可以加速VRFB和其他流电池系统的工业应用.

关键词:

无形的 MnO2 2 的情况.电催化活动的电催化活性.石墨感觉到了石墨.轻度蚀刻工程轻度蚀刻工程氧化还原流电池氧化还原流电池

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