Performance of new 10 kW class MCFC using Li/K and Li/Na electrolyte
- Central Research Institute of Electric Power Industry, Kanagawa-ken (Japan); and others
The molten carbonate fuel cell (MCFC) uses generally mixture of lithium carbonate and potassium carbonate (Li/K) as the electrolyte. NiO cathode dissolution is one of serious problems for MCFC life. The NiO cathode has been found to dissolve into the electrolyte as Ni{sup 2+} ion which is reduced to metallic Ni by H{sub 2} in the fuel gas and bridges the anode and the cathode. The bridges short circuit and degrade cell performance and shorten cell life. Since solubility of NiO in mixture of lithium carbonate and sodium carbonate (Li/Na) is lower than in Li/K, it takes longer time to take place slowing by NiO cathode dissolution in Li/Na compared with in Li/K. The ionic conductivity of Li/Na is higher than of Li/K, however, oxygen solubility in Li/Na is lower 9 than in Li/K. A new 10 kW class MCFC stack composed of Li/K cells and Li/Na cells, was tested. Basic performance of the Li/K cells and Li/Na cells of the stack was reported.
- Research Organization:
- Fuel Cell Seminar Organizing Committee (United States)
- OSTI ID:
- 460249
- Report Number(s):
- CONF-961107--Absts.; ON: TI97001494
- Country of Publication:
- United States
- Language:
- English
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