Lithium battery anode slurry mixing solvent and method for preparing lithium battery anode slurry by using solvent

A lithium battery and mixed solvent technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of environmental and human hazards, high prices, etc., and achieve the effects of low raw material prices, easy recycling, and long cycle life

Active Publication Date: 2017-01-04
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a lithium battery positive electrode slurry mixing solvent and a preparation method of a lithium battery positive electrode slurry using the solvent, which solves the problem that the prior art lithium battery positive electrode slurry mixing solvent is expensive and easily causes environmental and environmental damage. Technical Issues of Human Hazards

Method used

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  • Lithium battery anode slurry mixing solvent and method for preparing lithium battery anode slurry by using solvent
  • Lithium battery anode slurry mixing solvent and method for preparing lithium battery anode slurry by using solvent
  • Lithium battery anode slurry mixing solvent and method for preparing lithium battery anode slurry by using solvent

Examples

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Effect test

Embodiment 1

[0025] In this example, the solvent for the positive electrode slurry of the lithium battery is N,N-dimethylacetamide, dimethyl sulfoxide, tetramethylurea, and trimethyl phosphate mixed according to the molar ratio of 6:2:1:1. into a mixed solvent;

[0026] The preparation method of the lithium battery cathode slurry using the mixed solvent comprises the following steps:

[0027] S1. Weigh the following raw materials by weight percentage: 94.5% of lithium iron phosphate, 1.0% of conductive carbon black, 1.5% of carbon nanotubes, and 3.0% of polyvinylidene fluoride;

[0028] S2. Weigh 10Kg of lithium iron phosphate, 0.1058Kg of conductive carbon black, and 0.1587Kg of carbon nanotubes, put them in a vacuum oven at 150°C, bake for 20 hours, weigh 0.3175Kg of polyvinylidene fluoride and put them in a vacuum oven at 80°C medium, bake for 20 hours, set aside;

[0029] S3. Add 4Kg of mixed solvent and 0.3175Kg of polyvinylidene fluoride baked in step S2 to the vacuum mixer, stir a...

Embodiment 2

[0043] In this embodiment, nickel-cobalt-lithium-manganese-oxide ternary material is selected as the positive electrode material, wherein the molar ratio of nickel-cobalt-manganese in the nickel-cobalt-lithium-manganese-oxide ternary material is 1:1:1, and the positive electrode slurrying solvent of the lithium battery in this embodiment is N , N-dimethylacetamide, dimethyl sulfoxide, tetramethylurea, and trimethyl phosphate are mixed solvents in a molar ratio of 6:3:0.5:0.5;

[0044] The preparation method of the lithium battery cathode slurry using the mixed solvent comprises the following steps:

[0045] S1. Weigh the following raw materials in weight percentage: 95% of lithium iron phosphate, 2.5% of conductive carbon black, 0.5% of graphite conductive agent, and 3.0% of polyvinylidene fluoride;

[0046] S2. Weigh 10Kg of nickel-cobalt lithium manganate ternary material, 0.2632Kg of conductive carbon black, and 0.0526Kg of graphite conductive agent, put them in a vacuum ov...

Embodiment 3

[0061] In this embodiment, nickel-cobalt-lithium-manganese-oxide ternary material is selected as the positive electrode material, wherein the molar ratio of nickel-cobalt-manganese in the nickel-cobalt-lithium-manganese-oxide ternary material is 1:1:1, and the positive electrode slurrying solvent of the lithium battery in this embodiment is N , N-dimethylacetamide, dimethyl sulfoxide, tetramethylurea, and trimethyl phosphate are mixed solvents in a molar ratio of 7:2:0.5:0.5;

[0062] The preparation method of the lithium battery cathode slurry using the mixed solvent comprises the following steps:

[0063] S1. Weigh the following raw materials in weight percentage: 95% of lithium iron phosphate, 2.5% of conductive carbon black, 0.5% of graphite conductive agent, and 3.0% of polyvinylidene fluoride;

[0064] S2. Weigh 10Kg of nickel-cobalt lithium manganese oxide ternary material, 0.2632Kg of conductive carbon black, and 0.0526Kg of graphite conductive agent, put them in a vac...

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Abstract

The invention provides lithium battery anode slurry mixing solvent and a method for preparing lithium battery anode slurry by using the solvent, and relates to the technical field of batteries. The lithium battery anode slurry mixing solvent is mixed solvent prepared by mixing N,N-dimethyl acetamide, dimethyl sulfoxide, tetramethylurea and trimethyl phosphate. The lithium battery anode slurry mixing solvent can be applied to a lithium battery anode slurry mixing technology, is low in raw material cost, green, environmentally friendly and good in safety performance, cannot generate irritative or poisonous gas or damage health of human bodies or bring environmental pollution when being decomposed, is easy to recycle, good in performance and free of hygroscopicity and can be applied and popularized and bring considerable social benefits and society benefits.

Description

technical field [0001] The invention relates to the technical field of batteries, and relates to a lithium battery positive electrode slurry mixing solvent and a method for preparing lithium battery positive electrode slurry using the solvent. Background technique [0002] Lithium-ion batteries have the advantages of high open circuit voltage, high energy density, low self-discharge rate, no memory effect, environmental friendliness, high cycle times, fast charge and fast discharge, etc. As an important chemical power source, lithium-ion batteries have been widely used in portable small electrical appliances such as mobile phones, notebook computers, cameras, and aerospace fields, and are gradually moving towards the field of electric vehicle power. [0003] At present, in the production process of lithium-ion batteries, N-methylpyrrolidone (NMP) is widely used as a slurry solvent. N-methylpyrrolidone has low viscosity, good chemical and thermal stability, high polarity, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/621H01M10/0525Y02E60/10
Inventor 周治雷
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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