▎ 摘 要
NOVELTY - Resource recycling of waste lithium manganate cathode material involves using recycled waste lithium manganese oxide as raw material, obtaining manganese-based material after acid leaching and delithiation treatment, mixing manganese-based material, nickel-based active material and functional additive, and performing high-energy ball milling to obtain a manganese-nickel-based composite material. USE - Method for resource recycling of waste lithium manganate cathode material used for preparing alkaline secondary battery positive electrode with excellent cycle performance (claimed). ADVANTAGE - The method has a short process flow, easy industrial application, and has a high utilization rate of manganese resources, which reduces the waste of resources and environmental pollution caused by waste lithium-ion batteries, and is conducive to the sustainable development of the new energy industry. DETAILED DESCRIPTION - Resource recycling of waste lithium manganate cathode material involves using recycled waste lithium manganese oxide as raw material, obtaining manganese-based material after acid leaching and delithiation treatment, mixing manganese-based material, nickel-based active material and functional additive, and performing high-energy ball milling to obtain a manganese-nickel-based composite material, The nickel-based active material is nickel molybdate, nickel tungstate, partially oxidized spherical nickel hydroxide, partially sulfided spherical nickel hydroxide, layered hydroxide including nickel-based compound of formula NixMyN'Z(OH)2(Ba-)b.mH2O, in which M= aluminum (Al), titanium (Ti), bismuth (Bi) or chromium (Cr), N'=cerium (Ce), calcium (Ca), magnesium (Mg), cobalt (Co), yttrium (Y), zinc (Zn), ytterbium (Yb), antimony (Sb) or lutetium (Lu), Ba-= OH-, chlorine (Cl-), fluorine (F-), S2-, PO43-, SO42-, CO32-, NO3-, BO2-, MoO42-, WO42-, citrate or borate, x=0.9-0.5, y=0.3-0.1, z=0.2-0.01, x+y+z=1, b=0, and m=0. The waste nickel-containing lithium-ion battery positive electrode material or waste nickel-containing lithium-ion battery positive electrode material are treated by oxidation delithiation. The functional additive is chromium oxide, chromium hydroxide, strontium oxide, strontium hydroxide, ytterbium oxide, bismuth sulfide, cerium dioxide, antimony-doped tin oxide or strontium titanate. INDEPENDENT CLAIMS are included for: 1. an alkaline secondary battery positive plate, which is: prepared from manganese-nickel-based composite material; and 2. an alkaline secondary battery, which comprises: a battery case, an electrode plate group sealed in the battery case and an electrolyte, where the plate group includes a positive plate, a negative plate and a separator, the positive plate adopts the alkaline secondary battery positive plate, and the negative plate adopts hydrogen storage alloy negative pole, iron negative pole or zinc negative pole.