一块石头,两只鸟:浸的网状层通过去除和转换表面隔离来增强氧气还原活动
Yanling Zhou1, Yang Gao1, Guichan Chen1
1College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China.
Journal of colloid and interface science
|June 6, 2025
概括
这项研究开发了一种用于固体氧化物燃料电池 (SOFC) 和质子陶燃料电池 (PCFC) 的新型PrCoO3 (PCO) 涂层阴极,通过解决土分离和导电问题显著提高性能.
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
- 能源转换 能源转换
背景情况:
- 固体氧化物燃料电池 (SOFC) 和质子陶燃料电池 (PCFC) 的高性能阴极因土分离和低电子导电性而面临挑战.
- 这些问题限制了燃料电池设备的实际应用和长期稳定性.
研究的目的:
- 开发一种新的电极结构,克服性土壤分离并提高SOFC和PCFC阴极中的电子导电性.
- 通过创新的阴极设计,提高燃料电池的整体电池性能和功率密度.
主要方法:
- 一个独特的电极架构是通过涂层一个烧结的活性骨干,如Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF),与一个在位形成的多孔网状PrCoO3 (PCO) 层.
- 该策略在BSCF上进行了测试,BSCF是一种以高氧降解活性而闻名的材料,但容易分离和低导电性.
- 使用对称电池和阳极支持的燃料电池评估了PCO涂层BSCF阴极 (BSCF-PCO) 的性能.
主要成果:
- BSCF-PCO阴极在600°C时表现出0.02 Ω cm2的显著低面积特异极化电阻,这比最新的BSCF (0.04 Ω cm2) 显著改善.
- 使用BSCF-PCO的阳极支燃料电池在600°C达到1835mWcm−2的最大功率密度,而标准BSCF的功率密度为987mWcm−2.
- 在现场的PCO涂层有效地消除了表面分离,并增强了阴极的电导率和氧降低活性.
结论:
- 在现场开发的涂层策略为SOFC和PCFC构建高性能阴极提供了一个简单且通用的方法.
- 这种方法有效地解决了表面分离问题,并将其转化为有益的涂层,从而达到优越的电化学性能.
- 该策略显示了广泛应用的潜力,显著提高了其他阴极材料的活性,如Ba0.5Sr0.5Fe0.8Zn0.2O3-δ.
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