Abstract
In-situ Ni andex-situ NiO(Li) cathodes were fabricated by cold pressing using Ni powder and Li2CO3 (in case ofexsitu cathode) with paraffin wax as a binder. The effects of compaction pressure, amount of binder, and sintering temperature on porosity, the average size of pore, Li* cation fraction, and the fracture strength were investigated in this study. The optimum compaction pressure was 100 kg/cm2 to prevent the brittleness and stress concentration caused by high compaction pressure. Also, 10 wt% of binder yielded best results and the strength decreased dramatically and revealed nonuniform pore and pore distribution beyond 10 wt%. To obtain reasonably high electric conductivity inexsitu cathode, the sintering temperature was chosen to be below 950°C to maintain the ration fraction of Li* is in the range of 0.02–0.06. In terms of the Ni-dissolution rate,exsitu cathode was more efficient thaninsitu cathode in the long-term operation except the initial 24hr period.
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Parkt, HH., Jang, CI., Shin, HS. et al. Fabrication and characteristics of porous Ni and NiO(Li) cathodes for MCFC. Korean J. Chem. Eng. 13, 35–39 (1996). https://doi.org/10.1007/BF02705886
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DOI: https://doi.org/10.1007/BF02705886