Process for efficiently leaching anode active material of waste lithium battery
A technology for positive electrode active material and waste lithium battery, which is applied in the field of high-efficiency leaching process of positive electrode active material of waste lithium battery, can solve the problems of large environmental pollution, low leaching efficiency, and high cost, and achieves less environmental pollution, improved leaching rate, and reduced leaching rate. effect of load
Inactive Publication Date: 2010-11-10
CENT SOUTH UNIV
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The invention discloses a process for efficiently leaching an anode active material of a waste lithium battery, which is characterized by splitting a waste lithium-ion battery to obtain an anode active material, leaching the active material with a vitriol / hydrogen peroxide mixed solution in counter current in a plurality of sections, and leaching the left residue with hydrochloric acid. The process firstly uses a vitriol / hydrogen peroxide solution system to leach the anode active material and uses hydrochloric acid to leach the left residue. Therefore, poor working environment and heavy environment pollution caused by a large amount of Cl2 generated when independently using the hydrochloric acid to leach are weakened maximally, and the leaching yield of the anode active material is improved to uttermost extent. The leaching yield of the anode active material of the waste lithium battery can be up to 99 percent by the method.
Description
A high-efficiency leaching process for positive electrode active materials of waste lithium batteries technical field The invention relates to comprehensive recovery and utilization of valuable components in waste lithium batteries, in particular to a method for efficiently leaching positive active materials of waste lithium batteries. Background technique Since the commercialization of lithium-ion batteries in 1990, it has unique characteristics such as high specific energy, high working voltage, small size, light weight, wide application temperature range, low self-discharge rate, long cycle life, no pollution, and good safety performance. The advantages are widely used in many civilian and military fields, such as cameras, mobile phones, notebook computers and portable measuring instruments. Especially in the small battery market such as mobile communication, it will gradually replace nickel metal hydride batteries and nickel cadmium batteries. Lithium-ion batteries ar...
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IPC IPC(8): H01M10/54
CPCY02E60/12Y02P10/20Y02W30/84
Inventor 唐新村满瑞林陈亮张阳曾智文李连兴肖源化王志敏瞿毅
Owner CENT SOUTH UNIV