Influence of microstructure on the electrochemical behaviour of LSCF-SDCC

International Conference on Mechanical Engineering Research and Application

Rahman, H.A.^1 ; Ng, K.H.^1 ; Ahmad, S.^1 ; Taib, H.^1 ; Mahzan, S.^1 ; Salleh, S.M.^1 ; Ismail, A.^1 ; Muchtar, A.^2

Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Johor

86400, Malaysia^1

Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi, Selangor

43600, Indonesia^2

关键词: Area-specific resistances;    Calcination temperature;    Composite cathode;    Electrochemical analysis;    Electrochemical behaviors;    Electrochemical behaviour;    LSCF-SDCC;    Single cell performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/494/1/012062/pdf
DOI  :  10.1088/1757-899X/494/1/012062

来源: IOP

【 摘 要 】

The correlation of cathode microstructure with the electrochemical behavior of LSCF-SDCC has been studied. In this study, LSCF-SDCC composite cathode powders were [e-mail] prepared using ball milling and calcined at 700-900°C. Cathode pellets were fabricated using the calcined powders via uniaxial press and sintered at 600°C. A reduction of pellet porosity (33.1-29.8%) was observed as the calcination temperature increased, which was also in line with the cross-sectional view of the pellet. In electrochemical analysis, dominant resistance was observed in all samples which corresponded to low adsorption of oxygen. Meanwhile, cathode prepared with calcined powders of7 50°C exhibited the least area specific resistance that yielded single cell performance of 139m W/cm2 at 550°C.