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开发用于低温固体氧化物燃料电池的介电铜酸盐基电解质的替代策略

Sajid Rauf¹, Muhammad Bilal Hanif², Zuhra Tayyab¹

¹College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.

Nano-micro letters

|September 26, 2024

概括

研究人员开发了一种用于低温固体氧化物燃料电池 (LT-SOFCs) 的新型电解质. 该CaCu3Ti4O12-Ni0.8Co0.15Al0.05LiO2-δ异构结构显著改善了LT-SOFC中的输出功率和开放电路电压.

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:

低温固体氧化物燃料电池 (LT-SOFC) 需要先进的电解质材料才能得到广泛采用.
开发具有高氧化物离子导电性的电解质对于高效的SOFC性能至关重要.

研究的目的:

研究一种介电材料CaCu3Ti4O12 (CCTO) 作为LT-SOFCs的潜在电解质.
为了评估CCTO及其异构结构的性能,使用Ni0.8Co0.15Al0.05LiO2-δ (NCAL) 作为LT-SOFC电解质.
了解 CCTO-NCAL 异构结构中提高电化学性能的潜在机制.

主要方法:

使用单个CCTO和CCTO-NCAL异构电解质制造和测试单细胞.
电化学性能评估包括输出功率和在450-550°C的开放电路电压 (OCV).
密度函数理论 (DFT) 计算用于分析电子和结构性质.

主要成果:

单个CCTO电解质电池在550°C下实现了~263mW cm−2的输出功率和0.95V的OCV.
CCTO-NCAL异构电解质电池表现出显著改善的性能:~605 mW cm−2输出功率和>1.0 V OCV.
DFT计算为CCTO,NCAL的电子和结构性质及其异构结构提供了洞察力,解释了性能提升.

结论:

CCTO-NCAL异构结构显示出作为LT-SOFCs的先进电解质的巨大希望.
将p型半导体 (NCAL) 与介电材料 (CCTO) 集成,可以提高电化学机制和电池性能.
这项研究提出了一种新策略,用于设计高性能LT-SOFC的新型电解质.

关键词:

介电体 CaCu3Ti4O1212 的电流.不同结构的电解质电解质.离子导电性离子导电性在LT-SOFCs中,我们可以看到SOFC.半导体半导体 Ni0.8Co0.15Al0.05LiO2−δ

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