Method for preparing nickel lithium manganate by using waste lithium manganate battery

A technology of old lithium manganese oxide and nickel manganese oxide lithium, which is applied in the field of recycling waste lithium manganese oxide batteries, to achieve the effects of easy control, large-scale application, and simple operation

Inactive Publication Date: 2014-10-01
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Existing technology only r

Method used

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  • Method for preparing nickel lithium manganate by using waste lithium manganate battery
  • Method for preparing nickel lithium manganate by using waste lithium manganate battery
  • Method for preparing nickel lithium manganate by using waste lithium manganate battery

Examples

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Embodiment 1

[0076] Discharge treatment, mechanical cutting, classification and dismantling of waste lithium manganate batteries are carried out sequentially to obtain battery case, diaphragm and positive and negative electrodes. Separate and recycle battery casings and separators. After the obtained positive and negative plates are mechanically crushed, washed and dried, they are soaked in NMP for a predetermined time, so that the binder PVDF on the positive and negative plates is dissolved in NMP, that is, the active material falls off from the current collector, and after Filter to obtain current collector and filter residue.

[0077] After washing and drying the obtained filter residue several times, take 1 g for use. Ball mill the filter residue, and then add 19.6 mL of H2SO with a concentration of 2 mol / L to the filter residue at 40°C 4 with 0.4 mL of 30 wt% H 2 o 2 , with a solid-to-liquid ratio of 50g / L, fully reacted under stirring conditions, and obtained filtrate and conduct...

Embodiment 2

[0080] Discharge treatment, mechanical cutting, classification and dismantling of waste lithium manganate batteries are carried out sequentially to obtain battery case, diaphragm and positive and negative electrodes. Separate and recycle battery casings and separators. After the obtained positive and negative plates are mechanically crushed, washed and dried, they are soaked in NMP for a predetermined time, so that the binder PVDF on the positive and negative plates is dissolved in NMP, that is, the active material falls off from the current collector, and after Filter to obtain current collector and filter residue.

[0081] After washing and drying the obtained filter residue several times, take 1 g for use. The filter residue was ball milled, and then 19.6 mL of 0.1 mol / L H 2 SO 4 with 4 mL of 30 wt% H 2 o 2 , the solid-to-liquid ratio is 10g / L, fully react under stirring conditions, and obtain the filtrate and conductive agent after filtration. The conductive agent wa...

Embodiment 3

[0084] Discharge treatment, mechanical cutting, classification and dismantling of waste lithium manganate batteries are carried out sequentially to obtain battery case, diaphragm and positive and negative electrodes. Separate and recycle battery casings and separators. After mechanically pulverizing, washing and drying the obtained positive and negative plates, soak them in N-N dimethylacetamide for a predetermined time, so that the binder PVDF on the positive and negative plates is dissolved in N-N dimethylacetamide , that is, the active substance falls off from the current collector and is filtered to obtain the current collector and filter residue.

[0085] After washing and drying the obtained filter residue several times, take 1 g for use. The filter residue was ball-milled, and then at 60°C, 48 mL of 0.7 mol / L H 2 SO 4 with 2 mL of 30 wt% H 2 o 2 , with a solid-to-liquid ratio of 20g / L, fully reacted under stirring conditions, and obtained filtrate and conductive ag...

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Abstract

The invention discloses a method for preparing nickel lithium manganate by using a waste lithium manganate battery, and belongs to the field of recycling of the waste lithium manganate batteries. The embodiment of the invention comprises the steps: obtaining a LiMn2O4-containing positive active material from the waste lithium manganate battery, leaching the positive active material to obtain a Li<+> and Mn<2+>-containing solution; then adding nickel salt, lithium salt and a precipitator into the Li<+> and Mn<2+>-containing solution, reacting to obtain a precipitate, calcining to obtain spinel LiNi0.5Mn1.5O4, and simultaneously implementing recycling of manganate and lithium. A lithium ion battery and a supercapacitor can be prepared by using a LiNi0.5Mn1.5O4 material provided by the embodiment of the invention, the 0.1 C specific discharge capacity of the lithium ion battery is 128-135mAh/g, the capacity retention ratio after 100-time cycle is higher than 90 percent; the specific capacity of the supercapacitor is 170-185F/g and is basically undamped after 500-time cycle. The method provided by the embodiment of the invention is easy to operate and control, and facilitates the large-scale application.

Description

technical field [0001] The invention relates to the field of recycling of waste lithium manganese oxide batteries, in particular to a method for preparing lithium nickel manganese oxide from waste lithium manganese oxide batteries. Background technique [0002] With the rapid development of my country's economy, high requirements are put forward for the rational and effective use of resources and the protection and governance of the environment. In terms of green energy storage, lithium-ion batteries, as a high-energy storage battery, have been widely used in portable electronic devices, pure electric vehicles and hybrid electric vehicles due to their advantages such as high energy density, long service life, good cycle performance and no memory effect. and other electronic equipment. Compared with other lithium-ion batteries, lithium manganese oxide batteries have the advantages of lower cost, better cycle performance, higher energy density, good safety, easy synthesis, an...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/48C22B7/00C22B47/00C22B23/00C22B26/12
CPCC22B7/00C22B23/00C22B26/12C22B47/00H01M4/505H01M4/525H01M10/54Y02E60/10Y02P10/20Y02W30/84
Inventor 梅周盛刘三兵朱广燕
Owner CHERY AUTOMOBILE CO LTD
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