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A method for regenerating waste lithium nickel cobalt manganate ternary cathode material

A technology of nickel-cobalt-lithium-manganese-manganese oxide and positive electrode materials, which is applied in chemical instruments and methods, solid waste removal, electrical components, etc., and can solve problems such as failure to realize closed-loop circulation of metal components, complex recycling process, and serious secondary pollution , to achieve the effect of promoting leaching efficiency, simple operation and low processing cost

Active Publication Date: 2018-12-21
CENT SOUTH UNIV
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  • Application Information

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Problems solved by technology

For the metal separation and recovery process, precipitation, solvent extraction, and crystallization methods are usually used to separate and recover metals in the leachate after leaching the positive electrode waste. The closed-loop circulation of the metal components in the positive electrode waste has not been realized, and there are serious secondary pollution and impure products. , complex recycling process, high recycling cost and other disadvantages

Method used

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  • A method for regenerating waste lithium nickel cobalt manganate ternary cathode material
  • A method for regenerating waste lithium nickel cobalt manganate ternary cathode material
  • A method for regenerating waste lithium nickel cobalt manganate ternary cathode material

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Embodiment 1

[0068] (1) Prepare a mixed acid solution in which the total concentration of mixed acids is 0.6M, wherein the concentration of phosphoric acid is 0.2M, and the concentration of citric acid is 0.4M. Take 100ml and put it into a 250ml flask, and adjust the speed to 500r / min. When the solution is heated to 90°C, add 2g LiNi 0.5 co 0.2 mn 0.3 o 2 Ternary cathode waste, stirred and reacted for 30min, then suction filtered to obtain + 、Ni 2+ 、Co 2+ , Mn 2+ The solution.

[0069] (2) Take 50ml (1) step gained solution, add (CH 3 COO) 2 Ni·4H 2 O,(CH 3 COO) 2 Co 4H 2 O and (CH 3 COO) 2 Mn 4H 2 O, regulate Ni 2+ ,Co 2+ and Mn 2+ The molar ratio of ions is 5:2:3, and the total metal ion concentration of the solution is 0.4M. At a stirring speed of 600rpm, the nickel-cobalt-manganese mixed solution was added dropwise into an appropriate amount of H by adopting a forward feeding method. 2 C 2 o 4 In the solution, the dropping rate was 9mL / min. During the reaction, ...

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Abstract

The invention discloses a method for regenerating waste lithium nickel cobalt manganate ternary cathode material of. The method comprises lixiviating the waste lithium nickel cobalt manganate ternarycathode material by using phosphoric acid- citric acid mixed acid solution to obtain a lixivium; adjusting the metal ion ratio of the lixivium by a nickel salt, a cobalt salt and a manganese salt, andthen adding the lixivium into an oxalic acid solution for coprecipitation reaction; pre-calcining the obtained precipitate to obtain nickel cobalt manganese oxide, and grinding and mixing the nickelcobalt manganese oxide with a lithium source, calcining a resultant object to obtain a regenerated lithium nickel cobalt manganate ternary cathode material; The method adopts mixed acid lixiviating process, the acid consumption is small, the lixiviating time is short, the cost is low, the environmental impact is small, and the reducing agent is not needed, and the process is simple; The mixed acidlixivium is directly used for synthesizing ternary cathode materials, thereby avoiding the complicated process of separating and purifying various metals in the lixivium in the prior art, and realizing the closed-loop recycling utilization of metals.

Description

technical field [0001] The present invention relates to a recycling method of nickel-cobalt-lithium-manganese-manganate ternary positive electrode material of waste lithium-ion batteries, in particular to a waste lithium-ion battery nickel-cobalt-lithium-manganese-oxide ternary positive electrode waste through mixed acid leaching, co-crystallization precipitation and high-temperature solid phase The method for realizing regeneration by reaction belongs to the technical fields of secondary resource recovery and utilization and circular economy. Background technique [0002] With the development and popularization of portable electronic devices and electric vehicles, the use of lithium-ion batteries has increased dramatically, while generating a large amount of solid waste of lithium-ion batteries. Studies have shown that by 2020, China's discarded lithium-ion batteries will reach 25 billion, and their quality will reach 500,000 tons. Due to the high content of heavy metals a...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/505H01M4/525B09B3/00C22B7/00
CPCH01M4/505H01M4/525H01M10/54C22B7/007B09B3/80Y02W30/84Y02P10/20Y02E60/10
Inventor 周涛庄璐琪孙琮皓
Owner CENT SOUTH UNIV
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