▎ 摘　　要

NOVELTY - A cathode active material is prepared by forming a mixture comprising layered lithium nickel oxide and one or more precursors to a cathode active material selected from electrolytic manganese dioxide, chemically-prepared manganese oxide, spinel-type lithium manganese oxide, layered lithium cobalt oxide, and/or layered lithium manganese oxide; and treating the mixture with an aqueous acid solution, preparing a cathode active material. USE - Preparation of cathode active material for primary alkaline battery (claimed). ADVANTAGE - The non-stoichiometric metal oxides can provide a battery with a high volumetric energy density. The non-stoichiometric metal oxide can have low solubility (e.g., less than 50 ppm) depending on the transition metal in the cathode active material. As a result, battery can have good ambient shelf life. Furthermore, a higher oxidation state can increase the capacity of the battery. The acid treatment can occur at low temperature to minimize side reactions and undesirable side products. An aqueous acid can provide protons which can partially displace alkali metal ions within the metal oxide crystal structure and help maintain the stability of the crystal structure. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for making a primary alkaline battery which involves preparing a cathode by treating, with an aqueous acid solution, a mixture comprising a layered lithium nickel oxide and one or more materials chosen from electrolytic manganese dioxide, chemically-prepared manganese oxide, spinel-type lithium manganese oxide, layered lithium cobalt oxide, and/or layered lithium manganese oxide, incorporating the cathode into a primary alkaline battery, incorporating an anode into the primary alkaline battery, and incorporating an alkaline electrolyte into the primary alkaline battery.