Preparation method of anode material of lithium battery

A positive electrode material and lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor low temperature performance, reduced battery discharge capacity, and decreased battery charge and discharge performance, and achieve good conductivity and flexibility. Effect of increasing charge and discharge capacity and improving charge and discharge performance

Active Publication Date: 2017-08-25
LIUZHOU HAOXIANGTE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are non-negligible defects in the preparation method of the positive electrode material of lithium iron phosphate in the prior art: 1) the electrochemical performance of the active material of the lithium iron phosphate positive electrode material is poor, resulting in poor low temperature performance of the lithium battery positive electrode material, The production and use of lithium iron phosphate lithium batteries are limited; 2) th

Method used

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  • Preparation method of anode material of lithium battery

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Example Embodiment

[0026]

[0027] A preparation method of lithium battery cathode material, which comprises the following steps:

[0028] Step A. Divide the positive active material into three equal parts, divide the conductive agent into three equal parts, divide the binder into four parts according to the weight ratio of 1:1:1:1.2, and divide the dispersant into 1:1:1:2 is divided into four parts, pour the first part of the binder into the mixer filled with solvent, and add the first part of the conductive agent and the first part of the first part to the mixer while stirring Positive active material, after adding the first aliquot of the conductive agent and the first aliquot of the positive active material, add the first dispersant to the blender, stir at high speed for 1 hour and then vacuum, when the vacuum in the blender reaches 0.01 When the pressure is MPa, continue pumping for 3 minutes and stir at medium speed for 1.5 hours under vacuum. After stirring, turn off the vacuum, add 0.2% abs...

Example Embodiment

[0037]

[0038] A preparation method of lithium battery cathode material, which comprises the following steps:

[0039] Step A. Divide the positive active material into three equal parts, divide the conductive agent into three equal parts, divide the binder into four parts according to the weight ratio of 1:1:1:1.2, and divide the dispersant into 1:1:1:2 is divided into four parts, pour the first part of the binder into the mixer filled with solvent, and add the first part of the conductive agent and the first part of the first part to the mixer while stirring Positive active material, after the first aliquot of conductive agent and first aliquot of positive active material are added, add the first dispersant to the mixer, stir at high speed for 2 hours and then vacuum, when the vacuum in the mixer reaches 0.01 When the pressure is MPa, continue pumping for 3 minutes and stir at medium speed for 2.5 hours under vacuum. After stirring, turn off the vacuum, add 0.2% absolute ethano...

Example Embodiment

[0048]

[0049] A preparation method of lithium battery cathode material, which comprises the following steps:

[0050] Step A. Divide the positive active material into three equal parts, divide the conductive agent into three equal parts, divide the binder into four parts according to the weight ratio of 1:1:1:1.2, and divide the dispersant into 1:1:1:2 is divided into four parts, pour the first part of the binder into the mixer filled with solvent, and add the first part of the conductive agent and the first part of the first part to the mixer while stirring Positive active material, after the first aliquot of conductive agent and first aliquot of positive active material are added, add the first dispersant to the mixer, stir at high speed for 1.5 hours and then vacuum, when the vacuum in the mixer reaches At 0.01MPa, continue pumping for 3 minutes and stir at medium speed for 2 hours under vacuum. After stirring, turn off the vacuum, add 0.2% absolute ethanol by weight of the ...

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Abstract

The invention discloses a preparation method of an anode material of a lithium battery. The method comprises the following steps: A, equally dividing an anode active material and a conductive agent into three equal parts, dividing a binding agent into four parts and dividing a dispersant into four parts, and mixing the first part of binding agent, the first part of dispersant, the first equal part of positive active substance and the first equal part of conductive agent to obtain a first mixed material; B, preparing a second mixed material and a third mixed material; C, mixing the first mixed material, the second mixed material and the third mixed material to obtain an inner core active material; D, covering a layer of inorganic nanometer film on the outer part of the inner core active material to obtain the anode material of the lithium battery. The anode material of the lithium battery, prepared by the invention, has good conductivity and is high in tapping density; moreover, the volume of the prepared battery is large, and scale production demand can be met.

Description

technical field [0001] The invention relates to the technical field of positive electrode materials for lithium batteries. More specifically, the present invention relates to a method for preparing a positive electrode material for a lithium iron phosphate lithium battery. Background technique [0002] The development and construction of clean energy is one of the most important fields of development in the world, and batteries are an important medium for rational and effective use of these new energy sources. Lithium-ion batteries have been widely used and developed in the weak current industry, and the key technology for preparing lithium batteries is battery materials, especially the positive electrode materials of lithium batteries. Currently commonly used positive electrode materials include lithium cobaltate positive electrode material, lithium nickel cobaltate positive electrode material, lithium iron phosphate positive electrode material and lithium manganate positi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/364H01M4/5825H01M4/625H01M4/626H01M4/628H01M10/0525Y02E60/10
Inventor 易鉴荣唐臻林荔珊
Owner LIUZHOU HAOXIANGTE SCI & TECH
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