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3698987 
Journal Article 
Production of Chemical Manganese Dioxide from Lithium Ion Battery Ternary Cathodic Material by Selective Oxidative Precipitation of Manganese 
Joo, SHo; Kang, J; Woong, K; Shin, SM 
2013 
1 
Materials Transactions
ISSN: 1345-9678 
54 
5 
844-849 
WOS:000321540700035 
We have conducted studies to produce chemical manganese dioxides (CMDs) from ternary cathodic materials by oxidative precipitation. In this study, a cathodic material was concentrated by pretreatment and leached with sulfuric acid to recover 1 L of a leachate containing 22.0 g/dm(3) of Co, 21.6 g/dm(3) of Mn, 24.2 g/dm(3) of Ni, 9.5 g/dm(3) of Li and 8 mg/dm(3) of Al as valuable metals. For selective oxidative precipitation of Mn (II) the leachate was reacted with 1 equivalent of Na2S2O8 based on the Mn concentration with stirring at 500 rpm at a temperature of 363 K for 18000 s. As a result of the reaction, it was confirmed that the majority of Mn was precipitated from the solution. XRD, PSA, TG-DTA, LECO and ICP analyses were performed to characterize the precipitate. The analytical results revealed the production of a chemical manganese dioxide (CMD) having a chemical composition of 84.60% MnO, 1.40% Co3O4, 0.11% Li2O, 0.25% NiO, 0.02% Al2O3, 0.06% S and 0.52% Na2O, an average particle diameter of 10.7 mu m, a crystal form of gamma-MnO2, and a purity of at least 98%. 
chemical manganese dioxide (CMD); Na2S2O8; oxidative precipitation; lithium ion battery ternary cathodic material