Calcium zincate with different morphologies,as negative electrode materials for Zn-Ni battery,is synthesized by the hydrothermal method. The prepared calcium zincate materials are characterized and determined by scanning electron microscope( SEM),X-ray diffraction( XRD),cyclic voltammetry( CV) and multiple rate charging and discharging technology.The results show that the calcium zincate samples prepared under 50℃,60℃ and 70℃ have a morphology of quadrilateral,irregular and hexagonal,respectively,all with h...