Preparation of Nano-scale Ni(OH)2 Based on Controlled Crystallization

The dispersive nano-scale Ni(OH)2 was synthesized by a improved controlled crystallization process and dehydrated by azeotropic distillation with n-butanol. The pH value and temperature of controlled crystallization were optimized to be 11.0 and 45℃, respectively. As-prepared nano-scale Ni(OH)2 was dispersive, of 20nm size, and characterized by both TEM and XRD analysis. It had discharge capacity in excess of 258mAh·g-1.