Preparation method of lithium ion battery positive pole size

A lithium-ion battery, positive electrode slurry technology, applied in battery electrodes, batteries, positive electrodes and other directions, can solve the problems of reducing colloid viscosity, high temperature deterioration of colloids, poor processing performance of pole pieces, etc., to achieve good dispersion effect and improve adhesion. Sexuality, the effect of avoiding destruction

Active Publication Date: 2016-03-16
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most lithium-ion battery manufacturers have disadvantages such as uneven dispersion of lithium iron phosphate lithium-ion battery cathode slurry and poor processing performance of the pole piece. People usually use extended stirring time, accelerated stirring speed, powder distribution and addition, dry powder sti

Method used

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  • Preparation method of lithium ion battery positive pole size
  • Preparation method of lithium ion battery positive pole size

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Experimental program
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Embodiment

[0022] First, first use lithium iron phosphate XCL01-2CPZ material (made by Shandong Jinggong Electronic Technology Co., Ltd.), single-walled carbon nanotubes CNT300 (Beijing Deco Island Technology Co., Ltd.), graphene (Beijing Deco Island Technology Co., Ltd.) and Conductive carbon black Super-p (Beijing Haiwei Jiaye Chemical Products Co., Ltd.) is vacuum-baked at 120±3℃, 8h in vacuum oven XHX8-121A (Shenzhen Xinyuren Technology Co., Ltd.), and the vacuum degree is ≤-0.095MPa . Polyvinylpyrrolidone PVPK90 (Guangzhou Batai Chemical Co., Ltd.) and polyvinylidene fluoride HSV900 (Arkema) are vacuum-baked at 80±3℃ for 8h in a vacuum oven XHX8-121A (Shenzhen Xinyuren Technology Co., Ltd.) , Vacuum degree ≤ -0.095MPa. After baking, the temperature is naturally cooled to below 40°C for later use. After baking, polyvinylidene fluoride and N-methylpyrrolidone are mixed with a mass ratio of 8:92 and added to the planetary mixer HY-DLH (100L) (Guangzhou Hongyun Machinery Co., Ltd.). Va...

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Abstract

The invention discloses preparation method of lithium ion battery positive pole size. The preparation method comprises the following steps: firstly mixing polyvinylidene fluoride and N-methyl pyrrolidone to prepare glue solution; mixing a relatively thick mixture of N-methyl pyrrolidone, a carbon nano tube, graphene and conductive carbon black at a high speed and dispersing to obtain conductive agent size; adding lithium iron phosphate and a certain amount of N-methyl pyrrolidone for twice to obtain a relatively thick mixture to mix at a high speed; and adding the N-methyl pyrrolidone to mix at a high speed, adding the glue solution to mix; and finally adjusting the viscosity and screening to obtain the lithium ion battery positive pole size which is good in performance.

Description

Technical field [0001] The invention belongs to the technical field of lithium batteries and is a method for preparing lithium ion battery positive electrode slurry. Background technique [0002] Lithium-ion batteries have high energy density, long cycle life, good rate performance and safety performance, and are green and environmentally friendly. They are currently the main energy products. In particular, lithium iron phosphate cathode material lithium-ion batteries have better cycle life, rate performance and safety performance. Based on their unique advantages, they are widely used in power fields such as electric buses. [0003] As an important part of the lithium ion battery, the positive electrode of the lithium ion battery has a great influence on the performance of the lithium ion battery. The preparation of the positive electrode slurry of the lithium ion battery directly affects the comprehensive performance of the lithium ion battery. At present, most lithium ion batte...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M4/136H01M4/1397H01M10/0525
CPCH01M4/136H01M4/1397H01M4/5825H01M4/62H01M4/625H01M10/0525H01M2004/028H01M2220/20Y02E60/10
Inventor 关成善宗继月张敬捧王勇李涛
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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