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Pole piece slurry, electrode plate and pole piece slurry manufacturing method

A production method and electrode sheet technology, which can be applied to battery electrodes, circuits, electrical components, etc., and can solve problems such as battery stability and safety impact

Inactive Publication Date: 2019-03-05
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the operating voltage is an effective means to increase energy density, but too high a voltage will affect the stability and safety of the battery

Method used

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  • Pole piece slurry, electrode plate and pole piece slurry manufacturing method
  • Pole piece slurry, electrode plate and pole piece slurry manufacturing method
  • Pole piece slurry, electrode plate and pole piece slurry manufacturing method

Examples

Experimental program
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Effect test

preparation example Construction

[0028] According to the preparation method provided by the present invention, step 1: after the conductive agent and the electrode active material are premixed, the polymer modifier is added to the premixed conductive agent and electrode active material for surface modification, Finally the binder and the solvent are added. The polymer modifier is attached to the surface of the conductive agent as the surface protection layer of the conductive agent, which reduces the gas production in the high temperature environment of the lithium-ion battery, increases the stability of the battery cell, and improves the surface properties of the conductive agent and the relationship between the conductive agent and the solvent. compatibility between them.

[0029] figure 1 It is a schematic diagram of the molecular structure generation of the polymer modifier provided by the present invention. The polymer modifier is Depend on (Bismaleimide (Bismaleides)) polymerized. where R can be ...

Embodiment

[0035] The cathode material is LiCoO 2 Structure, according to mass percentage, 96% of positive electrode material, 2% of conductive carbon black, 0.5% of polymer modifier, and 1.5% of PVDF are added into N-methylpyrrolidone (NMP) solvent to form the positive electrode sheet.

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PUM

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Abstract

The invention relates to pole piece slurry for preparing a lithium ion battery. The pole piece slurry comprises an electrode active material and an electrically conductive agent, and further comprisesa polymer modifier attached to the surface of the electrically conductive agent, with the polymer modifier being a bismaleimide polymer. The invention also relates to an electrode plate produced fromthe pole piece slurry and a pole piece slurry manufacturing method.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a pole piece slurry for a lithium ion battery, an electrode piece, and a method for making the pole piece slurry. Background technique [0002] Lithium-ion batteries are green, high-energy and environmentally friendly batteries that appeared in the 1990s. Due to their advantages such as high voltage, small size, light weight, high specific energy, no memory effect, no pollution, small self-discharge, and long life, they are used in mobile phones, Notebook computers, camcorders, digital cameras, tablet computers, and other portable electronic products that emphasize thinness, lightness, compactness, and multiple functions are rapidly popularized. [0003] In recent years, with the depletion of global petroleum energy and the development of new energy technologies, the lithium-ion battery technology used in automobile power has developed rapidly. Therefore, higher requirements...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525H01M4/131
CPCH01M4/131H01M4/366H01M4/525H01M4/628H01M10/0525Y02E60/10
Inventor 陈文勤陈柏延许展翔唐宇轩马嘉琳郭铭书张必圣姜欣妮邱进隆戴丰源
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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