Patent ID: 9614217
Date: 2017-04-04
CPC Classifications: H01M,Y02E,Y02P,Y10T

Claim:
1. A nickel-zinc secondary battery, characterized by comprising: a battery case; an electrode assembly, disposed in the battery case; an electrolyte solution, positioned in the battery case, and filled around the electrode assembly, wherein the electrode assembly comprises a nickel positive electrode, a zinc negative electrode, and a membrane separator disposed between the nickel positive electrode and the zinc negative electrode; wherein the zinc negative electrode comprises a negative electrode substrate and a composition of negative electrode active material coated on the negative electrode substrate, the negative electrode substrate having a surface having several crossed shallow grooves, the negative electrode active material comprising: 40 wt %˜60 wt % ZnO; 5 wt %˜10 wt % Zn; 1.5 wt %˜3.5 wt % Zn(OH) 0.5 wt %˜2 wt % Ca(OH) 0.5 wt %˜3 wt % Bi 0.001 wt %˜0.02 wt % In(OH) 20 wt %˜30 wt % binder; and 5 wt %˜10 wt % additive; and wherein the nickel positive electrode comprises: a substrate and positive electrode material coated on the surface of the substrate; the positive electrode material comprises: 68 wt %˜69 wt % positive electrode active material, 0.6 wt %˜1 wt % yttrium oxide, 0.2 wt %˜0.6 wt % calcium hydroxide, 3.5 wt %˜4 wt % nickel powder, and a binder in balance, the binder is a mixture of polyfluortetraethylene emulsion and hydroxymethyl cellulose solution wherein the polyfluortetraethylene emulsion has a concentration of 50 wt %˜70 wt, or a mixture of polyfluortetraethylene and hydroxypropyl methyl cellulose solution wherein the polyfluortetraethylene has a concentration of 50 wt %˜70 wt; and the positive electrode active material is a spherical nickel hydroxide coated with Co