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一个优秀的甲化矿阴极,具有高活性和CO2抗性,用于在700°C以下运行的固氧化燃料电池

Dehong Huang¹, Shanglan Wu¹, Yi Wang¹

¹College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Guangdong Engineering & Technology Research Centre of Graphene-Like Materials and Products, Jinan University, Guangzhou 510632, China.

Journal of colloid and interface science

|January 4, 2024

概括

一种新的正极材料Bi0.15Sr0.85Co0.8Fe0.2O3-δ (BiSCF) 对固体氧化物燃料电池 (SOFC) 显示出出色的性能和二氧化碳耐受性. 这一发现使得SOFC在较低温度下能够高效地运行.

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:

降低运行温度对于固体氧化物燃料电池 (SOFC) 来说至关重要,以提高成本效益和耐用性.
开发耐受常见燃料杂质,如二氧化碳 (CO2) 的稳定和活性阴极材料仍然是一个重大挑战.

研究的目的:

评估Bi0.15Sr0.85Co0.8Fe0.2O3-δ (BiSCF) 作为一种新的,耐CO2和高活性的SOFCs的阴极材料.
研究基于BiSCF的SOFC的电化学性能,长期稳定性和二氧化碳耐受性机制.

主要方法:

合成和BiSCF阴极材料的表征.
电化学阻抗光谱 (EIS) 用于测量细胞性能.
在模拟的SOFC操作条件下进行长期稳定性测试.
对二氧化碳耐受性和可逆性的分析.

主要成果:

BiSCF表现出极好的电化学活性 (在700°C时为0.062 Ω cm2),与最先进的阴极相美.
带有BiSCF的阳极支持的SOFC在650°C时实现了912 mW cm−2的功率密度.
在暴露于CO2后,BiSCF表现出了显著的长期稳定性 (500小时) 和快速可逆性.
异常的二氧化碳耐受性归因于基本性降低和高电子阴性,抑制碳酸盐的形成.

结论:

在低温 (<700°C) SOFC 应用中,BiSCF 是一个有前途的阴极材料.
它的优越的二氧化碳耐受性和稳定性为实际的SOFC部署提供了显著的优势.
该材料的特性为更强大,更高效的燃料电池技术铺平了道路.

关键词:

二氧化碳的耐用性碳的耐用性中间操作中间操作氧降解反应是氧降解反应.固体氧化物燃料电池是一种固体氧化物燃料电池.

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