Abstract: 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.
Keywords: pretreatment; anode-supported cell; triple phase boundary (TPB); solid oxide fuel cell (SOFC)
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Jung, G.-B.; Fang, L.-H.; Chiou, M.-J.; Nguyen, X.-V.; Su, A.; Lee, W.-T.; Chang, S.-W.; Kao, I.-C.; Yu, J.-W. Effects of Pretreatment Methods on Electrodes and SOFC Performance. Energies 2014, 7, 3922-3933.
Jung G-B, Fang L-H, Chiou M-J, Nguyen X-V, Su A, Lee W-T, Chang S-W, Kao I-C, Yu J-W. Effects of Pretreatment Methods on Electrodes and SOFC Performance. Energies. 2014; 7(6):3922-3933.
Jung, Guo-Bin; Fang, Li-Hsing; Chiou, Min-Jay; Nguyen, Xuan-Vien; Su, Ay; Lee, Win-Tai; Chang, Shu-Wei; Kao, I-Cheng; Yu, Jyun-Wei. 2014. "Effects of Pretreatment Methods on Electrodes and SOFC Performance." Energies 7, no. 6: 3922-3933.