ZHANG Huilin 1, LIU Shaoming 2, KANG Wei 2, HUANG Zuzhi 1, HU Guangzhou 1, WANG Shaorong 1
(1. China University of Mining and Technology, Xuzhou 221000, Jiangsu, China; 2. State Key Laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute Limited Company, Beijing 102209, China)
Abstract: Intermediate temperature solid oxide fuel cell (SOFC) has been the main research direction of SOFC. The use of electrode supported structure is the important strategy to reduce the thickness of electrolyte films. However, thick electrodes usually cause obvious concentration polarization, thus limiting the electrochemical performances of the cells. Therefore, optimization of the pore structure of the supporting electrode is the key to reduce the concentration polarization of the electrode supported SOFC. Traditional porous ceramic fabrication technology mostly uses pore forming agents such as graphite and starch, resulting in random distribution of pores and hence zigzag channels in the support, which has high resistance for gas transportation, making the concentration polarization phenomenon inevitable. In order to tackle this problem, a combination of phase conversion method and extrusion and casting technology was proposed to develop the support body with vertical through holes. In this paper, the pore forming characteristics of phase-inversion and the application in SOFC are discussed.
Key words: cathode-supported; phase-inversion tape casting; solid oxide fuel cell