在现场构建基于高的三相复合电极,以实现高效的可逆固体氧化物电池
Yuechao Yao1, Jiangyuan Feng1, Liangfei Xu1,2
1Beijing Huairou Laboratory, Beijing, 101400, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|August 26, 2025
概括
这项研究引入了一种用于可逆固体氧化物 (R-SOC) 的新型高复合物. 这种新材料显著提高了电极的耐用性和电化学性能,为实际的能源应用铺平了道路.
科学领域:
- 材料科学
- 电化学
- 储能和转化
背景情况:
- 可逆固体氧化物电池 (R-SOC) 对于能源应用至关重要,但由于空气电极的耐用性较差和反应动力较慢而受到限制.
- 现有的空气电极材料难以稳定和高效,阻碍了R-SOC技术的广泛采用.
研究的目的:
- 为R-SOC空气电极开发一种基于高的三相复合材料.
- 在R-SOC中研究新的HEP电极的电化学性能和耐用性.
- 展示HEP材料在实用,大面积R-SOC应用中的潜力.
主要方法:
- 高基 (HEP) 三相复合物的合成: (La0.2Sr0.2Pr0.2Ba0.2) xCoO3-δ,包括A位缺乏基,合CeO2和Co3O4相.
- 优化HEP电极的电化学表征,包括700°C的区域特异电阻 (ASR) 测量.
- 在燃料电池 (FC) 和电解电池 (EC) 模式下使用HEP电极的R-SOC的性能评估,包括稳定性测试.
主要成果:
- 优化的HEP电极在700°C时达到0.058 Ω cm2的低ASR.
- 与最先进的电极相比,观察到增强的稳定性,环境空气的改善是2倍,防潮性增加了6倍,Cr耐受性增加了3倍.
- 带有HEP电极的R-SOC表现出色:在1.2V (EC) 和800°C时,其峰值功率密度为1.68W cm-2和1.5A cm-2.
- 在大面积 (10 × 10 cm) 的R-SOC中首次应用高氧化物材料,在1.18V (EC) 时产生61W (FC) 和66A.
结论:
- 开发的高基复合材料为R-SOC空气电极提供了卓越的催化活性和耐用性.
- 这种材料大大超越了传统电极的局限性,表现出了显著的稳定性和电化学性能.
- 在大面积的R-SOC中成功实施强调了高氧化物的实用能量转换和储存装置的巨大潜力.
相关概念视频
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