Recycling and regeneration process method for waste automobile power battery anode material

A technology of positive electrode material and power battery, which is applied in the field of recycling and regenerating the positive electrode material of waste automobile power battery, can solve the problem of no uniform standard for industrialized recycling, and achieve the effect of realizing sustainable utilization of resources, reducing energy consumption and saving cost.

Inactive Publication Date: 2018-05-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the material recycling of waste power batteries is still in the preliminary research stage, and there is no uniform standard for industrial recycling

Method used

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  • Recycling and regeneration process method for waste automobile power battery anode material
  • Recycling and regeneration process method for waste automobile power battery anode material
  • Recycling and regeneration process method for waste automobile power battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Discharge the battery safely to 2.0V; replace the electrolyte, cut the battery along the top with diagonal pliers, disassemble the battery, separate the removed cells, separate the positive electrode, negative electrode, and diaphragm, and the positive electrode part is to be deal with. Clean the negative electrode and separator in a closed environment and collect them for later use; cut the positive electrode part into 4-9cm 2 Place the small pieces in NMP or deionized water to immerse and ultrasonicate for 5 hours, add a strong base to dissolve the residual aluminum chips, and then carry out vacuum drying after centrifugation. After calcining at 500°C for 2.5 hours, the recycled electrode material was obtained, and lithium supplementation was carried out according to n(Ni+Co+Mn) / nLi=1:1.05~1.1, and NH 3 · H 2 O-NH 4 NO 3 The buffer solution is adjusted to pH=8, and the slurry is made in the ball mill, the inlet temperature is set at 180°C, the outlet temperature i...

Embodiment 2

[0030] Discharge the battery safely to 2.0V; replace the electrolyte, cut the battery along the top with diagonal pliers, disassemble the battery, separate the removed cells, separate the positive electrode, negative electrode, and diaphragm, and the positive electrode part is to be deal with. Clean the negative electrode and separator in a closed environment and collect them for later use; cut the positive electrode part into 4-9cm 2 Place the small pieces in NMP or deionized water to immerse and ultrasonicate for 5 hours, add a strong base to dissolve the residual aluminum chips, and then carry out vacuum drying after centrifugation. After calcining at 500°C for 2.5 hours, the recycled electrode material was obtained, and lithium supplementation was carried out according to n(Ni+Co+Mn) / nLi=1:1.05~1.1, and NH 3 · H 2 O-NH 4 NO 3 The buffer solution is adjusted to pH=8, and the slurry is made in the ball mill, the inlet temperature is set at 180°C, the outlet temperature i...

Embodiment 3

[0032] Discharge the battery safely to 2.0V; replace the electrolyte, cut the battery along the top with diagonal pliers, disassemble the battery, separate the removed cells, separate the positive electrode, negative electrode, and diaphragm, and the positive electrode part is to be deal with. Clean the negative electrode and separator in a closed environment and collect them for later use; cut the positive electrode part into 4-9cm 2 Place the small pieces in NMP or deionized water to immerse and ultrasonicate for 5 hours, add a strong base to dissolve the residual aluminum chips, and then carry out vacuum drying after centrifugation. After calcining at 500°C for 2.5 hours, the recycled electrode material was obtained, and lithium supplementation was carried out according to n(Ni+Co+Mn) / nLi=1:1.05~1.1, and NH 3 · H 2 O-NH 4 NO 3 The buffer solution is adjusted to pH = 8, and the slurry is made in the ball mill. The inlet temperature is set at 180°C, the outlet temperature...

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Abstract

The invention discloses a recycling and regeneration process method for a waste automobile power battery anode material and relates to the field of lithium ion battery anode materials. According to the process, a physical method is adopted as a main method, a chemical method is adopted as an auxiliary method, recombination is implemented together with spray granulation, and thus spherical or sphere-like granules. A battery of a waste power battery is adopted as a raw material, lithium is replenished into a recycled waste ternary material, in addition homogenate is prepared, the waste ternary material is regenerated through spray pelletization, and thus an anode material is regenerated and applied to lithium batteries. By adopting the process, submicron-granules of porous micro nano structures are recombined and regenerated by using a spray pelletization method, the specific surface area is effectively reduced, lithium ion exchange is effectively improved through the porous micro nano structures, regeneration repairing of waste materials can be promoted, and power charge and discharge properties are recovered. The process has the advantages of being high in production efficiency, simple and feasible in operation, low in cost, and the like, meanwhile the environment is protected, regenerated products are prepared, resource utilization of waste power battery materials is achieved,and relatively great economic benefits and social benefits can be made.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery positive electrode materials, in particular to a process for recycling and regenerating waste automobile power battery positive electrode materials. Background technique [0002] With the rapid development of the electric vehicle industry, ternary materials are used in the field of electric vehicles due to their good cycle performance, high specific capacity, and low cost. The application of power batteries also has a broader space. Lithium-ion batteries have attracted extensive attention because of their high energy density, small size, and light weight. [0003] At present, most of the cathode materials in my country are mostly lithium iron phosphate, but due to its own energy density and poor conductivity, it cannot meet the requirements of the national standard. According to the "Energy Saving and New Energy Vehicle Industry Development Plan (2012-2020)" released in June 2012, by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 赵煜娟徐涛肖湘韩颖倩
Owner BEIJING UNIV OF TECH
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