具有高功率密度和稳定的燃料电池,使用18-基酸作为氧降低反应调解剂
Chenxi Liang1, Yige Liu1, Yiyang Liu1
1Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Energy and Power Engineering, Beihang University, Beijing, 100191, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|April 21, 2025
概括
使用18-基酸 (18-PMA) 作为氧化还原介质的中介燃料电池实现了高功率密度. 这一进步为传统燃料电池技术提供了稳定高效的替代方案.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 能源转换 能源转换
背景情况:
- 中介燃料电池 (MedFCs) 是对质子交换膜燃料电池的替代品.
- 目前的调解器面临着电化学活性和稳定性的挑战,限制了MedFC的性能.
- 解决这些局限性对于推进燃料电池技术至关重要.
研究的目的:
- 在MedFC中引入一种新的氧化还原媒介,以增强氧降解反应 (ORR) 活性和稳定性.
- 评估使用新调解器的MedFCs的性能和耐用性.
- 为贵金属催化剂和复杂的管理系统展示一个可行的替代方案.
主要方法:
- 使用道森型18-基多聚酸 (18-PMA) 作为氧化还原介质.
- 在中介燃料电池设置中使用普通碳电极.
- 通过功率密度测量和稳定放电试验评估燃料电池性能.
- 通过在外部反应器中替换催化剂来研究长期稳定性.
主要成果:
- 在干燥条件下达到600 mW cm-2的最大稳定状态功率密度.
- 在100500 mA cm-2.2的电流密度范围内表现出稳定的放电性能.
- 通过一种简单的Fe-N-C催化剂替换方法,证实了长期稳定性.
结论:
- 18-PMA表现出高的氧化还原活性和稳定性,使其成为有效的ORR媒介.
- 使用18-PMA的MedFC显示出显著的性能和稳定性改进.
- 这种方法为高效和持久的燃料电池应用提供了一个有希望的途径.
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