Preparation of Co(OH)2/HY composite and its electrochemical capacitance characteristics

The preparation of Co(OH)2/HY composite and its electrochemical capacitance characteristics were discussed. It was observed that the morphology of irregular particles of pure HY exhibited a good dispersity characteristics. It was also observed that the capacitance loss rate after 6000 consecutive cycles was negligible, about 5%, a fact that reveals the excellent electrochemical stability. The result shows that due to the high disperse capability of HY towards Co(OH)2, loose whisker like microstructures and small channels became available for the diffusion of OH- electrolyte ions through all Co(OH)2 thin layers.