Effect of contact area and depth between cell cathode and interconnect on stack performance for planar solid oxide fuel cells

JOURNAL OF POWER SOURCES

卷:240

Article

Jin, Le¹  Guan, Wanbing¹  Niu, Jinqi¹  Ma, Xiao¹  Wang, Wei Guo¹ 

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

关键词: Contact area;    Contact depth;    Degradation rate;    Stack;    Solid oxide fuel cell;   

DOI  :  10.1016/j.jpowsour.2013.04.027

来源: Elsevier

【 摘 要 】

Effect of contact area and depth between cell cathode and interconnect on output power density and degradation of stack for planar SOFCs has been investigated systematically. The results indicate that the maximum output power density (MOPD) of repeating units inside stack increases firstly and then decreases slightly with the increasing interface contact area and depth, respectively, showing an approximate convex parabolic relation of power density to interface contact area and depth. The degradation rate of repeating units decreases gradually for 972 h' operation under 0.75 V unit-cell voltage, 0.476 A cm(-2) current density and 41.8% fuel utilization with different contact area. At the optimum value of the interface contact area, the repeating unit inside stack appears no degradation under operation for 1060 h under 0.8 V unit-cell voltage, 0.444 A cm(-2) current density, and 78% fuel utilization efficiency. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.

【 授权许可】

Free