Method for preparing manganous-manganic oxide-doped precursor and lithium manganate thereof from manganese-containing waste residues

• Main Authors: YE YOUMING, ZENG JUN, MA HAOHAO, YANG PENGFEI, XIE XUEZHEN, LIAO ZHENGDA
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a method for preparing a manganous-manganic oxide doped precursor from manganese-containing waste residues. The method comprises the following steps: (1) leaching; (2) removing calcium; (3) adjusting the proportion; (4) modifying and coprecipitating; and (5) preparation of a doped manganous-manganic oxide precursor: adding a certain amount of magnesium fluoride into the manganous-manganic oxide precipitate after primary doping, and carrying out ball milling and calcination to obtain the doped manganous-manganic oxide precursor. The process is simple and feasible, after the manganese-containing waste residues are leached, the manganese-containing waste residues can be directly used for preparing the doped manganous-manganic oxide only through simple calcium removal, the spinel lithium manganate positive electrode material is produced from the doped manganous-manganic oxide, and comprehensive recovery and efficient utilization of resources are achieved. 一种含锰废渣制备掺杂四氧化三锰前驱体的方法，包括如下步骤：（1）浸出