In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs
MetadataShow full item record
BaZr x Ce y Y 1-x-y O 3-Î´ are recognized proton-conducting electrolyte materials for proton-conducting solid oxide fuel cells (H + -SOFCs) below 650 Â°C. Here Co cations are incorporated into the BaZr 0.4 Ce 0.4 Y 0.2 O 3-Î´ (BZCY) scaffold to generate a 3D core-shell and triple-conducting (H + /O 2âˆ’ /e âˆ’ ) electrode in situ via infiltrating and reactive sintering. The core is the bulk BZCY scaffold, while the shell is composed of the cubic Ba(Zr 0.4 Ce 0.4 Y 0.2 ) 1-x Co x O 3-Î´ , cubic spinel Co 3 O 4 and cubic fluorite (Ce, Zr, Y)O 2 . The obtained electrode exhibits an excellent compatibility with the BZCY electrolyte, and performs well in yielding a low and stable polarization resistance for oxygen reduction reaction for intermediate-temperature H + -SOFCs. In particular, it achieves polarization resistances as low as 0.094 and 0.198 Î© cm 2 at 650 and 600 Â°C in wet air (3% H 2 O) when the sintering temperature for the electrode is 900 Â°C. In addition, a symmetrical cell also exhibits operation stability of 70 h at 650 Â°C. Furthermore, a fuel cell assembled with the 3D core-shell and triple-conducting electrode delivers a peak power density of âˆ¼330 mW cm âˆ’2 at 650 Â°C. The substantially improved electrochemical performance and high stability are ascribed to the unique core-shell structure and the formation of Ba(Zr 0.4 Ce 0.4 Y 0.2 ) 1-x Co x O 3-Î´ in the shell.
Showing items related by title, author, creator and subject.
3D core–shell architecture from infiltration and beneficial reactive sintering as highly efficient and thermally stable oxygen reduction electrodeChen, D.; Yang, G.; Ciucci, F.; Tade, Moses; Shao, Zongping (2014)Solid oxide fuel cells (SOFCs) as alternatives for energy conversion have the capacity to overcome low energy conversion efficiency, highly detrimental emissions from traditional fuel utilization and the limited reserves ...
Wang, D.; Wang, Y.; Zou, Y.; Lu, Chunsheng; Ma, Zengsheng (2018)© 2018 Springer-Verlag GmbH Austria, part of Springer Nature High-capacity active electrodes, such as Si anodes in Li-ion batteries, undergo a significant volume deformation of up to (Formula presented.) 400% during ...
A La0.8Sr0.2MnO3/La0.6Sr0.4Co0.2Fe0.8O3−δ core–shell structured cathode by a rapid sintering process for solid oxide fuel cellsAi, Na; Chen, Kongfa; Jiang, San Ping (2017)A La0.8Sr0.2MnO3 (LSM)/La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) core–shell structured composite cathode of solid oxide fuel cells (SOFCs) has been fabricated by wet infiltration followed by a rapid sintering (RS) process. The RS ...