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一个中氧电极可以实现高性能和耐污染物的可逆固体氧化物细胞
Feng Zhu1, Kang Xu1, Yuhe Liao1
1School of Environment and Energy, South China University of Technology, Guangzhou, China.
Nature communications
|February 11, 2026
概括
一个新的中氧电极 (ME-PBSCC) 提高了可逆固体氧化物细胞 (Re-SOCs) 的性能. 这种材料表现出优异的氧降解和进化活性,即使有污染,也为商业化铺平了道路.
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
- 能源转化和储存 能源转化和储存
背景情况:
- 可逆固体氧化物细胞 (Re-SOC) 的商业化取决于开发具有高氧降解反应 (ORR) 和氧演化反应 (OER) 活性的氧电极.
- 现有的氧气电极往往对等污染物的耐受性较差,限制了它们的实际应用.
- 对于稳定,高效和耐毒氧电极的需求对于推进Re-SOC技术至关重要.
研究的目的:
- 为Re-SOCs设计和合成一种新的中氧电极材料.
- 在各种条件下,包括污染,评估新电极在燃料电池 (FC) 和电解 (EC) 模式中的性能.
- 为了证明Re-SOCs使用开发的氧气电极的稳定和高效运行.
主要方法:
- 一个中氧电极的合成,其组成为Pr$_{0.5}$Ba$_{0.2}$Sr$_{0.2}$Ca$_{0.1}$CoO$_{3-δ}$ (ME-PBSCC).
- 描述ME-PBSCC电极的性能,包括表面氧空度,电导率,氧交换动力学和结构稳定性.
- 将ME-PBSCC电极集成到Re-SOC设备中,并测试它们在环境空气和Cr污染空气中的FC和EC模式中的性能.
主要成果:
- ME-PBSCC电极表现出高表面氧空度,优异的电导率和快速稳定的氧交换动力学.
- 使用ME-PBSCC电极的Re-SOC在FC模式下在750°C达到2.239W cm$^{-2}$ (空气) 和1.859W cm$^{-2}$ (Cr污染空气) 的最大功率密度.
- 在EC模式下,Re-SOC显示电流密度为1.10A cm$^{-2}$在1.3V和700°C下50%H$_{2}$O在Cr污染的空气中,在FC,EC和可逆模式下运行稳定.
结论:
- 开发的ME-PBSCC氧气电极提供高效且耐毒的ORR/OER性能,对于Re-SOC商业化至关重要.
- 该材料在污染下的稳定性和高活性突出显示了其在实际Re-SOC应用中的潜力.
- 这项工作为实现能够在受污染的环境中可靠运行的强大和高性能Re-SOC提供了有希望的途径.
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