The preparation of nickel oxide based on infinite dilute method and its electrochemical performance

With NaOH as precipitation agent and NiSO₄ · 6H₂O as raw material, Ni(OH)₂ particles were synthesized by infinite dilute method and sintered at 300°C for NiO. The synthesized NiO particles with a structure of cubic crystalline phase are well dispersed and ball-flower like with a diameter of 500 nm. The electrochemical tests show that the NiO particles have relatively high capacitance and excellent capacitive retention. The good structure and excellent performance suggest its promising application in supercapacitors.