具有可逆质子陶电池增强热力学兼容性的高基氧电极
Jianxiong Wang1,2, Zuo Li3, Wei Chen1
1School of Chemical and Environmental Engineering, China University of Mining & Technology-Beijing, Beijing, 100083, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 23, 2025
概括
新型高性矿,特别是Pr0.2Ba0.2Sr0.2La0.2Nd0.2CoO3-δ (PBSLNC),显示出可逆质子陶细胞 (R-PCC) 的氧气电极的潜力. 这些材料在能量转换和储存应用中表现出卓越的电化学性能和稳定性.
科学领域:
- 材料科学
- 电化学
- 能源转化和储存
背景情况:
- 可逆质子陶电池 (R-PCC) 对于能量转换和储存至关重要.
- 有效的氧电极对于R-PCC的性能至关重要,它需要高的氧降解/演化反应 (ORR/OER) 和兼容的热膨胀系数 (TEC).
研究的目的:
- 探索新型高性矿Pr0.2Ba0.2Sr0.2La0.2Nd0.2MeO3-δ (Me = Co,Fe,Mn) 作为R-PCC的潜在氧气电极.
- 评估这些新材料的电化学性能,热力学兼容性和稳定性.
主要方法:
- 高的矿的合成和表征.
- 在燃料电池 (FC) 和电解 (EC) 模式下评估TEC和电化学性能.
- 在各种操作条件下使用新型电极测试R-PCC (H2O电解,CO2-H2O联合电解,可逆操作).
主要成果:
- Pr0.2Ba0.2Sr0.2La0.2Nd0.2CoO3-δ (PBSLNC) 的TEC值为12.02 × 10-6 K-1,与BaCe0.7Zr0.1Y0.1Yb0.1O3-δ (BCYZYb) 的电解质相容.
- 使用PBSLNC的R-PCC在H2O电解 (在650°C时为1.39A cm-2) 和CO2H2O联合电解 (在700°C时为1.45A cm-2) 中实现了0.87W cm-2 (FC模式) 的峰值功率密度和高电流密度.
- 证明了异常稳定性:150小时 (FC/EC模式),96小时 (CO- H2合电解) 和100小时 (可逆模式).
结论:
- 新型高性矿,特别是PBSLNC,是R-PCC的有效氧电极.
- PBSLNC提供了一个有前途的策略,用于设计高效的基于CO的低TEC氧化物催化剂,用于先进的R-PCC.
- 这项研究促进了用于能源应用的高性能和稳定的R-PCC的开发.
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