Journal of Inorganic Materials ›› 2023, Vol. 38 ›› Issue (6): 693-700.DOI: 10.15541/jim20220551

• RESEARCH LETTER • Previous Articles     Next Articles

Enhanced Compatibility and Activity of High-entropy Double Perovskite Cathode Material for IT-SOFC

GUO Tianmin1(), DONG Jiangbo2, CHEN Zhengpeng2, RAO Mumin2, LI Mingfei2, LI Tian1, LING Yihan1()   

  1. 1. School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
    2. Guangdong Energy Group Science and Technology Research Institute Co., Ltd., Guangzhou 510000, China
  • Received:2022-09-21 Revised:2022-11-13 Published:2022-12-09 Online:2022-12-09
  • Contact: LING Yihan, professor. E-mail:
  • About author:GUO Tianmin (1991-), male, Master. E-mail:
  • Supported by:
    National Key R&D Program of China(2021YFB4001502);National Natural Science Foundation of China(52272257);National Natural Science Foundation of China(52104229)


Intermediate-temperature solid oxide fuel cell (IT-SOFC) is promising for carbon neutrality, but its cathode is limited by the contradiction between thermal compatibility and catalytic activity. Herein, we propose a high-entropy double perovskite cathode material, GdBa(Fe0.2Mn0.2Co0.2Ni0.2Cu0.2)2O5+δ (HE-GBO) with improved compatibility and activity, in view of the high-entropy strategy by multi-elemental coupling, which possesses double perovskite structure and excellent chemical compatibility with state-of-the-art Gd0.1Ce0.9O2-δ (GDC). The polarization resistance (Rp) of the symmetrical cells with HE-GBO cathode is 1.68 Ω·cm2 at 800 ℃, and the corresponding Rp of HE-GBO-GDC (mass ratio 7:3) composite cathode can be greatly reduced (0.23 Ω·cm2 at 800 ℃) by introducing GDC. Dendritic microchannels anode-supported single cells with HE-GBO and HE-GBO-GDC cathodes realize maximum power densities of 972.12 and 1057.06 mW/cm2 at 800 ℃, respectively, indicating that cell performance can be enhanced by high-entropy cathodes. The results demonstrate that high-entropy double perovskite cathode material HE-GBO has a high potantial to solve the conflict problem of thermal compatibility and catalytic activity in IT-SOFCs.

Key words: high-entropy cathode, solid oxide fuel cells, thermal compatibility, dendritic microchannels

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