Abstract: A novel strategy, which is better-suited for preparing materials with a very microscopic structure, is described and the whisker-like composite of Co(OH)₂/HY was prepared by using this strategy. In addition, the mechanism by which the growth proceeds is not very rigorously worked out. Due to the high dispersed capability of HY towards to Co(OH)₂ resulting in loose whisker-like microstructure of Co(OH)₂, small channels become available for the diffusion of OH - electrolyte ions through all Co(OH)₂ thin layer. Consequentially, the prepared composite shows a very high specific capacitance (483 F/g) and utilization (93%) of effective electroactive composition of composite.

Key words: Nanotechnology, Co(OH)₂/HY composite, Growth mechnism, Electrochemical capacitor