Catalyzing oxygen reduction reaction with a worm-like oxide Ca3Co2O6 in solid-oxide fuel cells

A worm-like oxide Ca3Co2O6 was prepared by electrostatic spinning as a cathode material for solid-oxide fuel cells. Compared to the plain granular structure, the worm-like Ca3Co2O6 exhibits a desirable morphological organization and an enhanced electrochemical performance. At 1073 K, polarization resistance with the worm-like cathode is favorably reduced to 0.151 Ω cm2, and the power peak of the corresponding single cell reaches to 512 mW cm−2, showing a fast cathodic kinetics. By contrast, the polarization resistance with the plain cathode is 0.275 Ω cm2, and the power peak of the corresponding single cell is 406 mW cm−2. Under a constant voltage load of applied 0.6 V at 1023 K, cell power with the worm-like cathode maintains steadily from 420 to 400 mW cm−2 after 14 h of running time, showing a less fading rate, a more stable performance, and a better application prospect than the plain cathode.

Xu, Yingxian (författare)
Wu, Qingqing (författare)
Zhao, Deqiang,1989-Stockholms universitet,Institutionen för material- och miljökemi (MMK),Chongqing Jiaotong University, People’s Republic of China(Swepub:su)dezh2306 (författare)
Deng, Mingsen (författare)
Yang, Hengxiu (författare)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

Av författaren/redakt...: Li, Fushao; Xu, Yingxian; Wu, Qingqing; Zhao, Deqiang, 1 ...; Deng, Mingsen; Yang, Hengxiu

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