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Recyclable water washing and alkali reducing method for ternary material of lithium ion battery

A lithium-ion battery, ternary material technology, applied in electrical components, battery electrodes, secondary batteries, etc., can solve the problems of complex wastewater treatment process, high cost, waste of water resources, etc., and achieve simple process, water resources and wastewater. The effect of low processing cost and reduced usage

Active Publication Date: 2019-05-03
NANTONG RESHINE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a resource-saving, environmentally friendly, simple process and low-cost lithium-ion battery for the problems of waste of water resources, complex wastewater treatment process, and high cost in the current ternary material washing process. Recyclable washing method for ternary materials

Method used

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  • Recyclable water washing and alkali reducing method for ternary material of lithium ion battery
  • Recyclable water washing and alkali reducing method for ternary material of lithium ion battery

Examples

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Embodiment 1

[0021] Such as figure 1 As shown, the present invention provides the following technical solutions: a recyclable water-washing and alkali-reducing method for ternary materials of lithium-ion batteries, using circulating filtrate to wash 811 ternary positive electrode materials, comprising the following steps:

[0022] 1) Add 0.1m3 deionized water into the mixing tank, add 100kg 811 ternary cathode material, stir for 30 minutes, put the slurry into the centrifuge, and after the preliminary solid-liquid separation, add 0.01m3 water to rinse the filter cake, and the filtrate enters the circulation storage tank , adding H2SO4 solution to adjust the pH value of the filtrate to 5.0;

[0023] 2) Use 0.1m of the filtrate from step 1) 3 , to wash the next batch of ternary cathode materials, other steps are the same as step 1);

[0024] 3) The cycle treatment steps are the same as step 2), and the positive electrode materials obtained by different cycles are tested to evaluate the was...

Embodiment 2

[0026] The difference from Example 1 is that the positive electrode material is NCA, and the circulating water washing steps are the same as in Example 1.

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Abstract

The invention discloses a recyclable water washing and alkali reducing method for a ternary material of a lithium ion battery. The method includes the following steps: putting a ternary positive electrode material and deionized water into a stirring barrel according to a certain proportion, performing stirring and washing, rinsing a filter cake with a small amount of deionized water after preliminary solid-liquid separation, and obtaining a powder material by solid-liquid separation again; and allowing a filtrate after the separation to enter a circulating storage tank, adding an acid solutionfor adjusting a pH value, treating the next batch of ternary positive electrode materials by utilizing the obtained filtrate, after circulating for a certain number of times, introducing the filtrateinto a wastewater treatment system, and recycling lithium in wastewater by filtration and evaporation devices. The method has the advantages of resource conservation, environmental friendliness, simple process and low cost, and meets industrial production.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a water-washing and alkali-reducing method for recyclable ternary materials of lithium-ion batteries. Background technique [0002] The ternary material has a high specific capacity, and the energy density of its single cell is greatly improved compared with LFP and LMO batteries. An increase in the nickel content of the ternary material will lead to a substantial increase in the residual alkali on the surface of the particles, which in turn will cause serious gas production during charging and discharging, resulting in battery swelling and deformation, shortened cycle and storage life, and potential safety hazards. [0003] Reducing the amount of residual alkali on the surface is of great significance for the practical application of NCA and high-nickel ternary materials in power batteries. At present, manufacturers generally use the process of washing,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M10/0525
CPCY02E60/10
Inventor 赵亮亮张新龙赵云虎秦锦
Owner NANTONG RESHINE NEW MATERIAL
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