• 专利标题:   Resource recycling of waste lithium manganate cathode material used for preparing alkaline secondary battery positive electrode with excellent cycle performance, involves using recycled waste lithium manganese oxide as raw material, obtaining manganese-based material after acid leaching.
  • 专利号:   CN115411392-A
  • 发明人:   LI Q, WU C, LI L, CHEN M, YANG X, YANG R, LI H, LIU Q, SHANGGUAN E
  • 专利权人:   UNIV HENAN NORMAL
  • 国际专利分类:   C01G053/00, H01M010/0525, H01M010/54, H01M004/36, H01M004/505, H01M004/525
  • 专利详细信息:   CN115411392-A 29 Nov 2022 H01M-010/54 202308 Chinese
  • 申请详细信息:   CN115411392-A CN11055227 31 Aug 2022
  • 优先权号:   CN11055227

▎ 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.