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Preparation method of lithium-ion battery

A lithium-ion battery and deionized water technology, applied in electrode manufacturing, secondary batteries, battery electrodes, etc., can solve the problems of poor cycle performance of nickel-cobalt-manganese ternary materials, and achieve light weight, lower impedance, and long-term charging The effect of discharge times

Inactive Publication Date: 2019-05-21
泰顺永庆电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3) Improve the poor circulation of existing nickel-cobalt-manganese ternary materials;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of lithium ion battery comprises the following steps:

[0038] Step 1, positive electrode material production:

[0039] S1. Pretreatment of raw materials. The positive electrode of lithium-ion batteries uses nickel-cobalt-manganese ternary materials (LiNiCoMnO 2 ), the nickel-cobalt-manganese ternary material is baked at 150°C under normal pressure for 1-2 hours, cooled in a sealed cooling tank for later use; the conductive agent is a mixture of superconducting graphite and graphite milk, Bake for 2 hours, control the water content at 3-4%, and the particle size is 3um. Cool in a sealed cooling tank for later use; Standby after cooling in a sealed cooling tank; polyvinylidene fluoride (PVDF) selects NMP (N-methylpyrrolidone) with an average relative molecular mass of more than 110,000;

[0040]S2, the blending of raw materials, the nickel-cobalt-manganese ternary material, binder and conductive agent raw materials are ground into powder by ball ...

Embodiment 2

[0059] The difference between embodiment 2 and embodiment 1 lies in the preparation of positive electrode material blending;

[0060] S1. Pretreatment of raw materials. The positive electrode of lithium-ion batteries uses nickel-cobalt-manganese ternary materials (LiNiCoMnO 2 ), the nickel-cobalt-manganese ternary material is baked at 150°C under normal pressure for 1-2 hours, cooled in a sealed cooling tank for later use; the conductive agent is a mixture of superconducting graphite and graphite milk, Bake for 2 hours, control the water content at 3-4%, and the particle size is 3um. Cool in a sealed cooling tank for later use; Standby after cooling in a sealed cooling tank; polyvinylidene fluoride (PVDF) selects NMP (N-methylpyrrolidone) with an average relative molecular mass of more than 110,000;

[0061] S2, the blending of raw materials, the nickel-cobalt-manganese ternary material, binder and conductive agent raw materials are ground into powder by ball milling, and the...

Embodiment 3

[0066] The difference between embodiment 3 and embodiment 1 lies in the preparation of positive electrode material blending;

[0067] S1. Pretreatment of raw materials. The positive electrode of lithium-ion batteries uses nickel-cobalt-manganese ternary materials (LiNiCoMnO 2 ), the nickel-cobalt-manganese ternary material is baked at 150°C under normal pressure for 1-2 hours, cooled in a sealed cooling tank for later use; the conductive agent is a mixture of superconducting graphite and graphite milk, Bake for 2 hours, control the water content at 3-4%, and the particle size is 3um. Cool in a sealed cooling tank for later use; Standby after cooling in a sealed cooling tank; polyvinylidene fluoride (PVDF) selects NMP (N-methylpyrrolidone) with an average relative molecular mass of more than 110,000;

[0068] S2, the blending of raw materials, the nickel-cobalt-manganese ternary material, adhesive and conductive agent raw materials are ground into powder by ball milling, and t...

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Abstract

The invention discloses a preparation method of a lithium-ion battery. The method comprises a preparation process of positive paste and negative paste, wherein the positive paste and the negative paste are prepared through the process of mixing, soaking, dispersion and flocculation of a positive raw material and a negative raw material; the positive paste contains, by weight, 80-90 parts of a nickel-cobalt-manganese ternary material, 1-5 parts of a binder and 5-20 parts of a conductive agent; and the negative paste contains polytetrafluoroethylene which is added according to the proportion of60% of negative raw material paste, wherein the 60% of polytetrafluoroethylene contains 2 parts of carboxymethylcellulose. According to the method, the nickel-cobalt-manganese ternary material is adopted as the positive raw material of the lithium-ion battery first, the positive raw material is made into appropriate paste through pretreatment of the positive material and the paste making process of mixing, soaking and flocculation, and the positive paste is spread on an aluminum thin film to form the intact lithium-ion battery in cooperation with the functions of the negative material, an electrolytic solution and a membrane. The battery has the advantages that discharge voltage is high, safety is good, and repeated discharge can be performed multiple times cyclically.

Description

technical field [0001] The invention relates to the technical field of new energy lithium-ion batteries, in particular to a preparation method of lithium-ion batteries. Background technique [0002] Lithium-ion batteries are an important part of new energy sources. Lithium-ion batteries, as rechargeable secondary batteries, are gaining more and more applications due to their multiple cycles and large capacity, especially in the electronics and automotive industries. The dependence is more obvious. The electronics industry and the automobile industry first require lithium-ion batteries to have high safety performance, and secondly require that they have more cycles of charging and discharging, and have less energy loss during charging and discharging, so that Lithium-ion batteries have a longer lifespan. [0003] The positive electrode materials of lithium-ion batteries include lithium iron phosphate, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide and ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0525H01M4/505H01M4/525H01M4/62H01M4/587H01M4/36H01M4/1391H01M4/1393H01M4/04H01M10/42
CPCY02E60/10Y02P70/50
Inventor 不公告发明人
Owner 泰顺永庆电力技术有限公司
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