Research on Ca and Fe co-doped PrBaCo2O5+δ as a cathode material of solid oxide fuel cells

doi:10.3969/j.issn.2097-0706.2024.07.006

Abstract

Abstract:

Solid oxide fuel cell （SOFC） is an efficient energy conversion device， which has demonstrated broad application prospects. The oxygen reduction reaction kinetics and stability of the cathode have been considered as two important factors of SOFC. Solid-state method is adopted to synthesize PrBa_0.8Ca_0.2Co_1.5Fe_0.5O₅₊_δ（PBCCF） with a tetragonal perovskite structure. The co-doping of Ca and Fe ions effectively reduces the thermal expansion coefficient of PrBaCo₂O₅₊_δ.The polarization resistance of a symmetrical half cell with a structure of PBCCF|GDC|SSZ|GDC|PBCCF at 800 ℃ is 0.082 Ω·cm²，indicating that the PBCCF cathode has high activity in the electrochemical reaction process. A single cell is prepared based on a NiO-YSZ|YSZ|GDC structured half cell with screen-printed PBCCF cathode filaments. And the half cell is composited by NiO-YSZ anode support and YSZ electrolyte through tape casting-lamellating hot pressing method， as well as screen-printed Gd_0.2Ce_0.8O_1.9（GDC）barrier layers. The power density of the single cell can reach 1.0 W/cm² at 800 ℃.In addition， the single cell also exhibits good short-term stability during the 60 h durability test. These results demonstrate that PBCCF is a very promising cathode material for SOFC.

Key words: solid oxide fuel cell, double perovskite, cathode, electrochemical performance

CLC Number:

TK02:TM911.4

YANG Lei, WANG Rui, MA Lili, SUN Ning, LI Xuelian, CHEN Ting, WANG Shaorong, SHI Caixia. Research on Ca and Fe co-doped PrBaCo₂O₅₊_δ as a cathode material of solid oxide fuel cells[J]. Integrated Intelligent Energy, 2024, 46(7): 47-52.

Figures/Tables 6

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Research on Ca and Fe co-doped PrBaCo₂O₅₊_δ as a cathode material of solid oxide fuel cells

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[3]	YANG Ying, ZHANG Yanxiang, YAN Mufu. Research progress on preparation methods of medium and low temperature SOFC electrolytes [J]. Integrated Intelligent Energy, 2022, 44(8): 50-57.
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