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Co掺杂La1.5Ca0.5NiO4+δ 阴极材料的电化学性能

辽宁石油化工大学学报

2024年 44卷第No.2期

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Title

Electrochemical Properties of Co⁃Doped La1.5Ca0.5NiO4+δ Cathode Materials

作者

蒋靖宋云峰马季张雷张磊磊宋昭远

Authors

Jing JIANG Yunfeng SONG Ji MA Lei ZHANG Leilei ZHANG Zhaoyuan SONG

单位

辽宁石油化工大学理学院，辽宁抚顺 113001

Organization

College of Sciences，Liaoning Petrochemical University，Fushun Liaoning 113001，China

摘要

采用溶胶凝胶法合成一种Ruddlesden?Popper(R?P)型富钴的新型层状钙钛矿型阴极材料La1.5Ca0.5Ni0.2Co0.8O4+δ (LCNC)，并进行了电化学性能测试。结果表明，LCNC在空气中400~800 ℃下的电导率为4~58 S/cm，优于多数SOFC阴极材料；在800 ℃下测得对称电池LCNC|LSGM|LCNC的极化阻抗为0.16 Ω·cm2，该电极基于300 μm厚La0.9Sr0.1Ga0.8Mg0.2O3-δ (LSGM)支撑的单电池的最大功率密度为527 mW/cm2，且连续工作50 h后单电池性能仅略微衰减；LCNC是一种具有潜力的SOFC阴极材料。

Abstract

A new type of Ruddlesden?Popper cobalt?rich layer perovskite oxide La1.5Ca0.5Ni0.2Co0.8O4+δ (LCNC) was synthesized by a sol?gel process. The results show that the conductivity of LCNC in air at 400 ℃ to 800 ℃ is 4~58 S/cm, which is better than that of most reported SOFC cathode materials. The polarization impedance of symmetrical battery LCNC|LSGM|LCNC is 0.16 Ω·cm2 at 800 ℃. The maximum power density of the single cell supported by 300 μm thick La0.9Sr0.1Ga0.8Mg0.2O3-δ (LSGM) with the LCNC cathode was 527 mW/cm2, and the performance of the single cell decreases slightly after working continuously for 50 hours. The experimental results show that LCNC is a potential SOFC cathode material.

关键词：

固体氧化物燃料电池; 电化学性能; 阴极; 电导率; 极化阻抗;

Keywords:

Solid oxide fuel cell; Electrochemical performance; Cathode; Electrical conductivity; Polarization impedance;

基金项目

国家自然科学基金青年科学基金项目(62105132);辽宁省兴辽英才青年拔尖人才计划项目(XLYC1807179)

DOI

10.12422/j.issn.1672-6952.2024.02.005