Positive electrode materials of low-cost alkaline secondary batteries and preparation methods and applications thereof

A positive electrode material of a low-cost alkaline secondary battery, comprising:

• a composite positive electrode material including manganese dioxide and layered hydroxide [NixMyAZ(OH)2]·[(Ba−)b·mH2O],
• a composite positive electrode material including the manganese dioxide and partially oxidized layered hydroxide [NixMyAZ(OH)2]·[(Ba−)b·mH2O],
• a composite positive electrode material including the manganese dioxide and layered hydroxyl oxide [NixMyAZOOH], or
• a composite positive electrode material including the manganese dioxide, a conductive material, and one of the layered hydroxide [NixMyAZ(OH)2]·[(Ba−)b·mH2O], the partially oxidized layered hydroxide [NixMyAZ(OH)2]·[(Ba−)b·mH2O], and the layered hydroxyl oxide [NixMyAZOOH], the composite positive electrode material having a three-dimensional structure, wherein M is Bi or Ti, A is one or two of Ce, Al, Zn, Ca, Mg, Co, Y, Ga, Sb, Yb, and Cu, Ba− is one of OH−, Cl−, F−, PO43−, SO42−, CO32−, NO3−, BO2−, MoO42−, and WO42−, wherein a is an integer equal to a number of negative charges of Ba−, 0.9≥x≥0.5, 0.3≥y≥0.1, 0.2≥z≥0.01, x+y+z=1, b>0, and m>0.