一个协同的三相,三导空气电极用于可逆的质子导体固体氧化物细胞
Weilin Zhang1, Yucun Zhou1, Xueyu Hu1
1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
ACS energy letters
|October 19, 2023
概括
研究人员开发了新的三导空气电极材料,用于可逆质子导体固体氧化物细胞 (R-PSOC). 这些材料提高了R-PSOC的效率和耐用性,这对于储能和转换应用至关重要.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 可逆质子导体固体氧化物电池 (R-PSOC) 为能源应用提供高效率和成本效益.
- 空气电极材料的开发对于克服R-PSOC中的能量损失和降解至关重要.
研究的目的:
- 开发新的三导空气电极材料,以提高R-PSOC性能.
- 研究兴奋剂对材料特性和电化学活性的协同效应.
主要方法:
- 将过渡金属和稀土金属离子化为导质子电解质.
- 电化学分析和理论计算以评估材料性能.
- 使用开发的空气电极材料制造和测试R-PSOC.
主要成果:
- 优化组合Ba$_{0.9}$Pr$_{0.1}$Hf$_{0.1}$Y$_{0.1}$Co$_{0.8}$O$_{3-δ}$ (BPHYC) 显示出卓越的活性和耐用性.
- 作为三相材料的BPHYC显示出增强R-PSOC性能的协同效应.
- 在600°C时,在1.3V (水电解模式) 达到1.37W cm$^{-2}$ (燃料电池模式) 和2.40A cm$^{-2}$的峰值功率密度.
- 经过数百小时的稳定运行.
结论:
- 开发的三导空气电极材料显著提高了R-PSOC的性能.
- 在BPHYC中多个阶段的协同效应是其增强活动和耐久性的关键.
- 这些发现为更高效和更具成本效益的电化学能源设备铺平了道路.
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