Abstract
A new method involving thermo-foaming of NiO powder dispersions in molten sucrose at 140°C followed by carbonization and carbothermal reduction at 1050oC has been used for the preparation of nickel foam. The molten sucrose acts as a medium for the dispersion of NiO powder for thermo-foaming as well as the source of carbon for the carbothermal reduction. The nickel foam produced from a composition consisting of 100g sucrose and 150.5107g NiO had purity as high as 99.5wt%. The nickel foam had interconnected cellular structure with a porosity of nearly 93.8% and showed an electrical conductivity of 3.97×105S/m suitable for electrode applications.
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