Improved performance of molten carbonate fuel cells with (Li/Na)2CO3 electrolytes by using BYS coated cathode at low operating temperatures |
| |
Authors: | Chang-Whan Lee Byeong Wan Kwon Min-Goo Kang Hyung-Chul Ham Sung-Pil Yoon Jonghee Han Young Jin Kim Min Chul Lee |
| |
Affiliation: | 1. Department of Mechanical System and Design Engineering, Seoul National University of Science and Technology, Gongneung-ro 232, Nowon-gu, Seoul, 01811, Republic of Korea;2. Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea;3. Fluid System Engineering Department, KEPCO Engineering and Construction Company, 111, Daedeok-daero 989 Beon-Gil, Yusung-Gu, Taejeon, 34057, Republic of Korea;4. Department of Safety Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon, 22012, Republic of Korea |
| |
Abstract: | In order to improve the stack life time of MCFCs, it is necessary to reduce the operating temperature of MCFCs below 600 °C, because reduced operating temperature minimizes electrolyte loss due to evaporation and corrosion. However, at the low operating temperature below 600 °C, the cell performance of MCFCs with (Li/Na)2CO3 electrolyte is too low to operate the fuel cell stack and system. In this study, we have performed wettability control of the liquid molten carbonate electrolyte by coating NiO cathodes with poor wetting property of the mixed ionic and electronic conductor (MIEC) such as BYS (Bi1.5Y0.3Sm0.3O3-δ). From experiments with symmetrical cells, each polarization component with various temperatures and gas conditions were studied. To investigate effects of the BYS coated cathode on the performance of MCFCs, a 100 cm2 single cell of MCFCs was employed. The performance of a 100 cm2 single cell with BYS coated cathode was better than that with conventional cathode by a factor of 1.84, because BYS coated cathode reduces activation polarization and mass transfer resistance greatly. |
| |
Keywords: | Wettability Molten carbonate fuel cell (MCFC) Cathode BYS |
本文献已被 ScienceDirect 等数据库收录! |
|