Pretreatment of nickel foam

Nickel foam is an excellent sound absorption material with a high sound absorption coefficient at high frequency; its sound absorption performance at low frequency can be improved by the design of the sound absorption structure. Nickel foam is also one of the best electrode materials for manufacturing cadmium-nickel batteries and hydrogen-nickel batteries. Nickel foam itself has very many excellent characteristics. Not only its specific gravity is very low, but also its specific surface area is very small; its mass is ultra-light, which has a very wide range of applications and application prospects. Before use, it must be pre-treated. Only when the metal is pretreated can it effectively improve its energy efficiency.

Nickel foam pretreatment: Nickel foam is cut to the required size for the sample and impregnated in a 3.0 mol/L HCl solution for 20 minutes to remove the oxide layer on its surface. Subsequently, the nickel foam was removed, rinsed repeatedly with anhydrous ethanol and ultrapure water, dried naturally, and impregnated in anhydrous ethanol and set aside. When the electrolyte is acidic, nickel foam should not be used as a substrate.