Solid oxide fuel cell (SOFC) is an energy conversion device which generates electricity from hydrogen. SOFC is attracting attentions because of its high energy conversion efficiency and low material cost. For transportation applications, high mechanical strength is required, which makes ceramic-based SOFC unsuitable. To overcome this limitation, metal-supported SOFC has been proposed. In this work, metal-supported SOFCs are developed by bonding metal substrates to ceramic cells with silver bonding paste. By using silver as bonding material, bonding was performed at temperature lower than 950°C in air atmosphere, which enables full sintering of cathode. Furthermore, electrical conductivity and thermal conductivity are improved, leading to lower ohmic resistance and better temperature distribution of metal-supported cells. As a result, 5 × 5 cm2 metal-supported SOFCs with power density of 433 mW cm-2 at 800°C were fabricated. The metalsupported SOFCs showed 10 times higher mechanical strength than conventional ceramic cells.
|Title of host publication||ECS Transactions|
|Editors||S. C. Singhal, T. Kawada|
|Publisher||Electrochemical Society Inc.|
|Number of pages||6|
|ISBN (Electronic)||9781607685395, 9781607688150|
|State||Published - 30 May 2017|
|Event||15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States|
Duration: 23 Jul 2017 → 28 Jul 2017
|Conference||15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017|
|Period||23/07/17 → 28/07/17|
Bibliographical noteFunding Information:
This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy of the Republic of Korea and the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the auspices of the Ministry of Education, Science and Technology of Korea. This work was also supported by the BK21 PLUS program through the National Research Foundation (NRF) funded by the Ministry of Education of Korea. In addition, this work was funded by the Saudi Aramco-KAIST CO2 Management Center.
© The Electrochemical Society.