A kind of method of batching negative electrode slurry of ultra-low temperature lithium ion battery

A lithium-ion battery, negative electrode slurry technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor low temperature resistance, batteries cannot operate normally, and achieve reduced dispersion difficulty, good wetting effect, and improved flow. sexual effect

Active Publication Date: 2021-02-23
深圳市三奇科技有限公司
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Problems solved by technology

[0005] In view of the problem in the prior art that the battery as a whole cannot operate normally in a low temperature environment due to the poor low temperature resistance of the negative electrode of the lithium ion battery, the purpose of the present invention is to provide an ultra-low temperature lithium ion battery negative electrode slurry The method of batching, by improving its overall electrical conductivity, to solve the above technical problems, it has good low temperature resistance during use

Method used

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  • A kind of method of batching negative electrode slurry of ultra-low temperature lithium ion battery
  • A kind of method of batching negative electrode slurry of ultra-low temperature lithium ion battery
  • A kind of method of batching negative electrode slurry of ultra-low temperature lithium ion battery

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Embodiment 1-8

[0039] Embodiment 1-8: a kind of method of ultra-low temperature lithium-ion battery negative electrode slurry batching, comprises the following steps:

[0040] Step 1, prepare materials, weigh graphite, anti-precipitation agent CMC, water-based adhesive SBR, deionized water, polyaniline, silicon oxide, accelerator in proportion with an electronic balance;

[0041] Step 2, graphite pretreatment, the graphite is placed in a high temperature reaction furnace under normal pressure for high temperature baking at a temperature of 350°C for 1 hour, and after cooling, passes through a 100-mesh sieve to obtain pretreated graphite;

[0042] Step 3, spraying, spray the accelerator on the surface of the graphite through the nozzle, then put it into a vacuum mixing tank, then add the anti-precipitation agent CMC, polyaniline, and silicon oxide for preliminary mixing, the stirring speed is 120rpm, and the time is 5min ;

[0043] Step 4: Stir and mix. Gradually add deionized water to the v...

Embodiment 9

[0048] Embodiment 9: A kind of method of ultra-low temperature lithium-ion battery negative electrode slurry batching, the difference with embodiment 1 is that accelerator mainly is made up of ethanol and isopropanol, and the weight and number ratio of ethanol and isopropanol is 1:1.5.

Embodiment 10

[0049] Embodiment 10: A kind of method of ultra-low temperature lithium-ion battery negative electrode slurry batching, the difference with embodiment 1 is that the accelerator is mainly composed of ethanol and isopropanol, and the weight and number ratio of ethanol and isopropanol is 1:1.8.

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Abstract

The invention discloses a method for batching ultra-low temperature lithium-ion battery negative electrode slurry, relates to the technical field of lithium-ion batteries, and solves the problem that the lithium-ion battery negative electrode has poor low temperature resistance and causes the whole battery to be in a low-temperature environment. Problems that don't work properly. The process steps include material preparation, graphite pretreatment, spraying, stirring and mixing, and seasoning and discharging. The raw materials mainly include graphite, anti-precipitation agent CMC, water-based binder SBR, deionized water, polyaniline, silicon oxide and accelerators. The ultra-low temperature lithium ion battery negative electrode slurry prepared by the invention has good low temperature resistance performance during use, and is beneficial to keep the battery as a whole in normal operation.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, more specifically, it relates to a method for batching negative electrode slurry of ultra-low temperature lithium ion batteries. Background technique [0002] Introduction Lithium-ion battery is a kind of secondary battery, which mainly relies on lithium ions to move between positive and negative electrodes to work. During the charging and discharging process, lithium ions intercalate and deintercalate back and forth between the two electrodes. When charging, lithium ions are deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte. The negative electrode is in a lithium-rich state, while the opposite is true during discharge. [0003] In the Chinese invention patent with the notification number CN102623689A, a manufacturing process of lithium ion battery negative electrode slurry using lithium titanate material is disclosed. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/362H01M4/483H01M4/621H01M4/624H01M4/625H01M10/0525Y02E60/10
Inventor 朱辉刘婷
Owner 深圳市三奇科技有限公司
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