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高性能可逆质子陶电池的A位点订制分层矿的电离子选择性缺陷工程

Yixiao Song¹, Yufei Song¹, Yuhao Wang²

¹State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|August 20, 2025

概括

在PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF) 的工程缺陷提高了可逆质子陶细胞的性能. 缺乏Ba/Sr的PBSCF在中低温下表现出优异的电化学活性和稳定性.

科学领域:

材料科学
电化学
可再生能源

背景情况:

可逆质子陶电池 (RPCC) 是化学电能转换的关键.
在中低温 (400~600°C) 操作对于商业可行性至关重要,但受到空气电极性能的限制.
现场订购的分层矿PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF) 是有前途的,但需要提高活性和稳定性.

研究的目的:

调查阴离子选择性缺陷对RPCC的A地点订购矿的性能的影响.
了解 Pr 缺陷 (p-PBSCF) 和 Ba/Sr 缺陷 (bs-PBSCF) 变体中的缺陷性能关系.
在中低温下增强PBSCF的电化学活性和长期稳定性.

主要方法:

缺乏Pr (p-PBSCF) 和缺乏Ba/Sr (bs-PBSCF) 的矿材料的合成和表征.
在RPCC中测试工程材料作为空气电极的电化学性能.
缺陷结构的分析,氧气电催化和运行条件下的稳定性.

主要成果:

Pr 缺陷通过削弱 Co-O 协同效应来增强氧气电催化活性,但通过降低氧气空度来降低稳定性.
Ba/Sr 缺陷通过削弱 Co-O 协价性和增加氧空度来显著提高电极活性.
缺乏Ba/Sr的PBSCF表现出优异的稳定性,由于强化的Ba-O/Sr-O键和抑制的离子分离,尽管水分增加了.

结论:

现场阴离子选择性缺陷工程是一种可行的策略,用于调整RPCC的分层矿性能.
在PBSCF中存在的Ba/Sr缺陷为在中低温下实现高活性和稳定提供了有希望的途径.
了解缺陷化学对于设计高效利用可再生能源的先进材料至关重要.

关键词:

一个网站订购分层的矿空气电极电离体缺陷氧气电催化反应可逆质子陶电池

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