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A kind of recycling process of lithium-ion battery ternary positive electrode material

A technology of lithium ion battery and positive electrode material is applied in the field of recycling and processing technology of ternary positive electrode material of lithium ion battery, which can solve the problems of complicated process, high production cost, increase of spray drying process, etc., and achieves simple recovery process and high production efficiency. , the effect of promoting the diffusion of raw materials and lattice growth

Active Publication Date: 2019-09-13
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process is a liquid phase treatment process, and the spray drying process is added, the process is more complicated and the production cost is higher

Method used

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  • A kind of recycling process of lithium-ion battery ternary positive electrode material

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Experimental program
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Embodiment 1

[0026] A recovery and treatment process for ternary positive electrode materials of lithium-ion batteries, comprising the following steps: dry-mixing the recovered ternary positive electrode materials, ternary hydroxide precursor materials, composite lithium salts and metal oxides with a high-speed mixer Afterwards, it is compacted with a bowl, cut into pieces in turn, pre-fired once, pre-fired twice, sintered once, sintered twice, crushed and classified to obtain the processed ternary cathode material.

Embodiment 2

[0028] A recovery and treatment process for ternary positive electrode materials of lithium-ion batteries, comprising the following steps: dry-mixing the recovered ternary positive electrode materials, ternary hydroxide precursor materials, composite lithium salts and metal oxides with a high-speed mixer Afterwards, it is compacted with a bowl, cut into pieces in sequence, pre-fired once, pre-fired twice, sintered once, sintered twice, crushed and classified to obtain the processed ternary cathode material;

[0029] Wherein, the recovered ternary cathode material is LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , the particle size is not greater than 2um, and the ternary hydroxide precursor material is Ni 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 ;

[0030] The molar composition ratio of the complex lithium salt (calculated as lithium) is lithium chloride: lithium hydroxide: lithium nitrate=1:49:50;

[0031] The metal oxide is zirconia;

[0032] The molar ratio of the recovered ternary positive electrod...

Embodiment 3

[0038] A recovery and treatment process for ternary positive electrode materials of lithium-ion batteries, comprising the following steps: dry-mixing the recovered ternary positive electrode materials, ternary hydroxide precursor materials, composite lithium salts and metal oxides with a high-speed mixer Afterwards, it is compacted with a bowl, cut into pieces in sequence, pre-fired once, pre-fired twice, sintered once, sintered twice, crushed and classified to obtain the processed ternary cathode material;

[0039] Wherein, the recovered ternary cathode material is LiNi 0.5 co 0.2 mn 0.3 o 2 , the particle size is not greater than 2um, and the ternary hydroxide precursor material is Ni 0.5 co 0.2 mn 0.3 (OH) 2 ;

[0040] The molar composition ratio of the complex lithium salt (calculated as lithium) is lithium chloride: lithium nitrate: lithium carbonate=0.2:44.8:55;

[0041] The metal oxide is aluminum oxide;

[0042] The molar ratio of the recovered ternary positiv...

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Abstract

The invention discloses a recovery processing technology for a ternary positive electrode material for a lithium-ion battery. The recovery processing technology comprises the following steps of mixingthe recovered ternary positive electrode material, a ternary hydroxide precursor material, a composite lithium salt and a metal oxide and then loading a mixture into a bowl for compaction; and sequentially carrying out dicing, primary presintering, secondary presintering, primary sintering, secondary sintering, crushing and grading to obtain the preprocessed ternary positive electrode material. According to the recovery processing technology, the anion-cation co-doped ternary material which is good in crystallization and normal in particle size can be prepared; the particle size and the tap density of the ternary material can be improved; the processability of the ternary material is improved; and meanwhile, the electrochemical properties of the ternary material can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a recycling process for lithium ion battery ternary positive electrode materials. Background technique [0002] Ternary cathode material nickel cobalt lithium manganese oxide material (LiNi x co y mn 1-x-y o 2 ) or lithium nickel cobalt aluminate material (LiNi x co y al 1-x-y o 2 ) better synthesizes the advantages of lithium nickelate, lithium cobaltate and lithium manganate three cathode materials, avoids their respective shortcomings, has the advantages of high energy density, good cycle performance, safety performance and rate performance, etc., and The resources are relatively abundant and the cost is moderate, and it is regarded as a popular candidate for the positive electrode material of the power battery. [0003] At present, the mainstream production process of ternary materials is to mix lithium salts with spherical ternary hydroxide precursors, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
Inventor 丁楚雄王庆莉陈龙
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY