Effects of Pretreatment Methods on Electrodes and SOFC Performance

Energies

Guo-Bin Jung¹  Li-Hsing Fang¹  Min-Jay Chiou¹  Xuan-Vien Nguyen¹  Ay Su¹  Win-Tai Lee²  Shu-Wei Chang²  I-Cheng Kao² 

[1] Department of Mechanical Engineering & Fuel Cell Center, Yuan Ze University, Taoyuan 32003, Taiwan; E-Mails:;Taiwan Power Company, New Taipei City 23847, Taiwan; E-Mails:

关键词: pretreatment;    anode-supported cell;    triple phase boundary (TPB);    solid oxide fuel cell (SOFC);   

DOI  :  10.3390/en7063922

来源: mdpi

【 摘 要 】

Commercially available tapes (anode, electrolyte) and paste (cathode) were choosen to prepare anode-supported cells for solid oxide fuel cell applications. For both anode-supported cells or electrolyte-supported cells, the anode needs pretreatment to reduce NiO/YSZ to Ni/YSZ to increase its conductivity as well as its catalytic characteristics. In this study, the effects of different pretreatments (open-circuit, closed-circuit) on cathode and anodes as well as SOFC performance are investigated. To investigate the influence of closed-circuit pretreatment on the NiO/YSZ anode alone, a Pt cathode is utilized as reference for comparison with the LSM cathode. The characterization of the electrical resistance, AC impedance, and SOFC performance of the resulting electrodes and/or anode-supported cell were carried out. It’s found that the influence of open-circuit pretreatment on the LSM cathode is limited. However, the influence of closed-circuit pretreatment on both the LSM cathode and NiO/YSZ anode and the resulting SOFC performance is profound. The effect of closed-circuit pretreatment on the NiO/YSZ anode is attributed to its change of electronic/pore structure as well as catalytic characteristics. With closed-circuit pretreatment, the SOFC performance improved greatly from the change of LSM cathode (and Pt reference) compared to the Ni/YSZ anode.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.