@article{LING2022, 
author = {Yihan LING and Xu HAN and Yang YANG and Tianqiang LIN and Xinxin WANG and Xuemei OU and Shaorong WANG},
title = {Stable High-Entropy Double Perovskite Cathode SmBa(Mn0.2Fe0.2Co0.2Ni0.2Cu0.2)2O5+δ for Intermediate-Temperature Solid Oxide Fuel Cells},
year = {2022},
journal = {Journal of the Chinese Ceramic Society},
volume = {50},
number = {1},
pages = {219-225},
keywords = {solid oxide fuel cells, double perovskite, high-entropy oxide, composite electrode},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20210514},
doi = {10.14062/j.issn.0454-5648.20210514},
abstract = {High-entropy double perovskite SmBa(Mn0.2Fe0.2Co0.2Ni0.2Cu0.2)2O5+δ(HE-SBC) as a cathode material was prepared by a modified Pechini method, and the performance of HE-SBC with 10% (in mole fraction) Gd2O3-doped CeO2 (GDC) (HE-SBC-GDC) was optimized. The results show that the thermal expansion of Co ions caused by the change of valence state can be reduced due to the formation of high-entropy at B-site, thereby reducing the thermal expansion coefficient of SBC. The polarization impedance (Rp) of the HE-SBC symmetrical cell with yttria-stabilized zirconia (YSZ) as an electrolyte is 1.04 Ω·cm2 at 800 ℃ and the maximum power density and Rp of the anode-supported single cell are 683.53 m W/cm2 and 0.46 Ω·cm2, respectively. Furthermore, the catalytic activity of HE-SBC is improved by the addition of GDC[m(HE-SBC):m(GDC)=7:3] due to the enlarged three-phase interface. The polarization resistance of HE-SBC-GDC composite cathode symmetric cell is only 0.09 Ω·cm2 at 800 ℃ and the maximum power density and Rp of the anode-supported single cell are 838.66 m W/cm2 and 0.12 Ω·cm2, respectively.}
}