All-Sputtered, Superior Power Density Thin-Film Solid Oxide Fuel Cells with a Novel Nanofibrous Ceramic Cathode.

Autor: Lee YH; Center for Energy Research, University of California, San Diego, La Jolla, California 92093, United States.; School of Mechanical Engineering, University of Ulsan, Ulsan 44610, Republic of Korea., Ren H; Materials Science and Engineering, University of California, San Diego, La Jolla, California 92093, United States., Wu EA; Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States., Fullerton EE; Materials Science and Engineering, University of California, San Diego, La Jolla, California 92093, United States.; Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States.; Center for Memory and Recording Research, University of California, San Diego, La Jolla, California 92093, United States.; Sustainable Power and Energy Center (SPEC), University of California, San Diego, La Jolla, California 92093, United States.; Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, United States., Meng YS; Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States.; Center for Memory and Recording Research, University of California, San Diego, La Jolla, California 92093, United States.; Sustainable Power and Energy Center (SPEC), University of California, San Diego, La Jolla, California 92093, United States., Minh NQ; Center for Energy Research, University of California, San Diego, La Jolla, California 92093, United States.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2020 May 13; Vol. 20 (5), pp. 2943-2949. Date of Electronic Publication: 2020 Mar 26.
DOI: 10.1021/acs.nanolett.9b02344
Abstrakt: Thin film solid oxide fuel cells (TF-SOFCs) are attracting attention due to their ability to operate at comparatively lower temperatures (400-650 °C) that are unattainable for conventional anode-supported SOFCs (650-800 °C). However, limited cathode performance and cell scalability remain persistent issues. Here, we report a new approach of fabricating yttria-stabilized zirconia (YSZ)-based TF-SOFCs via a scalable magnetron sputtering process. Notable is the development and deposition of a porous La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 2.95 (LSCF)-based cathode with a unique fibrous nanostructure. This all-sputtered cell shows an open-circuit voltage of ∼1.0 V and peak power densities of ∼1.7 and ∼2.5 W/cm 2 at 600 and 650 °C, respectively, under hydrogen fuel and air along with showing stable performance in short-term testing. The power densities obtained in this work are the highest among YSZ-based SOFCs at these low temperatures, which demonstrate the feasibility of fabricating exceptionally high-performance TF-SOFC cells with distinctive dense or porous nanostructures for each layer, as desired, by a sputtering process. This work illustrates a new, potentially low-cost, and scalable platform for the fabrication of next-generation TF-SOFCs with excellent power output and stability.
Databáze: MEDLINE
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