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通过A-Site缺陷工程提高固体氧化物燃料电池的p-n异构电解质的性能
Gang Qu1, Muhammad Akbar1, Bin Jin1
1School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China.
ACS applied materials & interfaces
|October 11, 2023
概括
矿氧化物电解质的A位点缺陷增强了低温固体氧化物燃料电池 (LT-SOFC) 的离子导电性和催化活性. 这种工程提高了异构性能,使得更高的输出功率和高效的电荷调节.
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:
- 半导体离子电解质对于低温固体氧化物燃料电池 (LT-SOFCs) 是至关重要的.
- 之前的工作建立了一个使用BaCo0.4Fe0.4Zr0.1Y0.1O3-δ (BCFZY) 和ZnO的p-n异构电解质.
- 优化离子导电和催化活性是提高LT-SOFC性能的关键.
研究的目的:
- 为了提高LT-SOFCs的BCFZY-ZnO异构电解质的性能.
- 研究BCFZYA位点缺陷对离子导电性和催化活性的影响.
- 分析A站点缺陷对接口能量频段对齐和电荷载体监管的影响.
主要方法:
- 合成了缺乏A位点的BCFZY氧化物 (B0.9CFZY和B0.8CFZY).
- 使用BxCFZY-ZnO异构电解质制造和测试单细胞LT-SOFC.
- 具有特征的离子导电性,催化活性和接口能量带对齐.
主要成果:
- 在BCFZY的A位点缺陷增加了表面和接口氧空缺,提高了离子导电性和催化活性.
- 与B0.9CFZY-ZnO和B0.8CFZY-ZnO的单个电池显示了与B1.0CFZY-ZnO (542 mW cm-2) 相比,在550°C时显著更高的峰值功率输出 (745和795mW cm-2).
- 在A位置的缺陷有效调整了p-n异质连接,促进了质子运输,同时防止了电流泄漏.
结论:
- 现场缺陷工程是一种可行的策略,用于优化LT-SOFCs的BCFZY-ZnO异构电解质.
- 修改后的电解质显示出更好的离子和催化性能,从而提高了燃料电池的性能.
- 这种方法为开发高效和稳定的LT-SOFC提供了一条途径.
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