Solid adulterating in nickel electrodes and its application in asymmetric hybrid capacitor

For adulterating nickel electrode with CoO and Zn powders, layers of solid solute materials will be deposited on the surface of Ni(OH)₂ after several charge-discharge cycles. This can optimize the composing and configuration of active materials on surface of Ni(OH)₂. Thus the nickel electrode is more suitable to work in C/Ni(OH)₂ asymmetric hybrid capacitor system. This work shows that in high rate discharge condition, the capacity of the nickel electrode adulterated with 10% CoO is 2 times of the capacity of the no adulterating electrode. If electron conductor, Ni powder is substituted by 5% Zn powder in the electrode, the high power capacity and cycle performance of the nickel electrode can be improved.