Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (7): 2059-2065.doi: 10.19799/j.cnki.2095-4239.2021.0628

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Electrochemical performance of La0.7Sr0.3Fe0.9Ni0.1O3-δ symmetric electrode for solid oxide fuel cell with CO as fuel

Changyang LIU1,2(), Liuzhen BIAN1,2(), Jianquan GAO1,2, Jihua PENG1,2, Jun PENG1,2, Shengli AN1,2()   

  1. 1.College of Materials and Metallurgy, Inner Mongolia University of Science and Technology
    2.Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Instruments, Baotou 014010, Inner Mongolia, China
  • Received:2021-11-25 Revised:2022-01-13 Online:2022-07-05 Published:2022-06-29
  • Contact: Liuzhen BIAN, Shengli AN E-mail:lcy520life@126.com;liuzhenbian@126.com;shengli_an@126.com

Abstract:

Sr、Ni co-doped La0.7Sr0.3Fe0.9Ni0.1O3-δ (LSFNi) electrode was synthesized using a sol-gel method. The oxidation of CO electrochemically on LSFNi was studied. The results demonstrate that the LSFNi electrode has good chemical compatibility with LSGM and GDC electrolytes. Furthermore, the conductivity of the LSFNi bar increases with the increasing temperature in the 5% H2-Ar, and the maximum conductivity of 0.85 S·cm-1 was obtained at 850 ℃. The peak power density of LSFNi-GDC/LSGM/LSFNi-GDC symmetric cell reaches 470, 288, 196, and 130 mW·cm-2 at 850 ℃, 800 ℃, 750 ℃, and 700 ℃, respectively. Furthermore, the polarization resistance (Rp ) of the symmetric full cell at the same condition is 0.64, 1.01, 1.83, and 3.82 ?·cm2, respectively. The charge transfer mechanism and adsorption/desorption of CO are slower than those of H2, resulting in a somewhat poorer electrochemical property. In the end, the symmetric cell exhibits a reasonable short stability with a degradation rate of 0.003 V·h-1 at 850℃ under a constant current density of 600 mA·cm-2.

Key words: solid oxide fuel cell, symmetric cell, carbon deposition, CO

CLC Number: