Method for synthesizing zinc-doped ternary material precursor from waste lithium battery through recovery
A technology for waste lithium batteries and ternary materials, applied in the field of ternary material precursors, can solve the problem of inability to remove impurity metals, and achieve the effect of increasing added value and reducing process flow
Active Publication Date: 2018-06-01
TIANQI LITHIUM CORP
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Abstract
A waste lithium battery contains Zn, and after a ternary precursor is doped with Zn, interface stability of an electrode/electrolyte and the structural stability at high voltage can be improved, increase of charge transfer resistance during the cycle is inhibited, and Li<+> diffusion is facilitated. Therefore, the invention discloses a method for synthesizing a zinc-doped ternary material precursor from the waste lithium battery through recovery. The method comprises the following steps: removing doping elements except Zn from an acid leaching solution of a waste lithium battery cell crushingmaterial, adjusting the content of Ni, Co and Mn, synthesizing a doping material with a coprecipitation method, and performing precipitation, washing and drying to obtain the single zinc-doped ternarymaterial precursor. The single zinc-doped ternary material precursor is obtained while the ternary precursor is synthesized from the waste lithium battery through recovery; the method has the advantages of being simple in process flow, good in doping effect, cost-saving and capable of significantly improving electrochemical performance of the precursor and the like.
Application Domain
Waste accumulators reclaimingBattery recycling
Technology Topic
Structural stabilityCoprecipitation +8
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