Battery electrode splice, preparation thereof, and battery prepared by the electrode splice

A battery electrode and electrode sheet technology, applied in the direction of electrode manufacturing, secondary batteries, active material electrodes, etc., to achieve the effects of good machinability, excellent toughness, and good cycle stability

Inactive Publication Date: 2009-07-15
SHENZHEN CAPCHEM TECH
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among all the measures that can improve the performance of lithium-ion batteries, improving the electrode material of the battery is the main means of utilization. At pre

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Battery electrode splice, preparation thereof, and battery prepared by the electrode splice
  • Battery electrode splice, preparation thereof, and battery prepared by the electrode splice

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example 1

[0045] Taking LiCol / 3Nil / 3Mnl / 3O2 as the research object, the specific preparation method of this battery electrode sheet includes the following steps:

[0046] The first step: add 200g LiCo 1 / 3 Ni 1 / 3 Mn 1 / 3 O 2 And 20g acetylene black conductive agent, uniformly dispersed in 300g N-methylpyrrolidone (NMP) solvent to prepare LiCo 1 / 3 Ni 1 / 3 Mn 1 / 3 O 2 -Conductive agent mixture.

[0047] The second step: add 20g polyvinylidene fluoride (PVDF) binder to mix the slurry, stir at a high speed of 4000 rpm, every 10 minutes of stirring, with a pause of 10 minutes in the middle, and the high-speed stirring time is not less than 2 hours. The entire slurry is fully mixed and uniform, and the viscosity of the slurry is 560 centipoise (CPS).

[0048] The third step: coating the prepared slurry on a coating machine, leaving it to stand for 1 hour and then drying, and the dry thickness of the electrode sheet is controlled between 60 μm and 120 μm.

[0049] Step 4: Use a roll...

Example Embodiment

[0050] Example 2

[0051] LiNi 0.8 Co 0.15 Al 0.05 O 2 For the research object, the specific preparation method of this battery electrode sheet includes the following steps:

[0052] The first step: add 200g LiNi 0.8 Co 0.15 Al 0.05 O 2 With 12g of acetylene black conductive agent, uniformly dispersed in 200g of N-methylpyrrolidone (NMP) solvent to prepare LiNi0.8 Co 0.15 Al 0.05 O 2 -Conductive agent mixture.

[0053] The second step: add 18g polyvinylidene fluoride (PVDF) binder to mix the slurry, stir at a high speed of 4000 rpm, every 10 minutes of stirring, with a pause of 10 minutes in the middle, and the high-speed stirring time is not less than 2 hours. The entire slurry is fully mixed and uniform, and the viscosity of the slurry is 520C.PS.

[0054] The third step: coating the prepared slurry on a coating machine, leaving it to stand for 1 hour and then drying, and the dry thickness of the electrode sheet is controlled between 60 μm and 120 μm.

[0055] The fourth step: u...

Example Embodiment

[0056] Example 3

[0057] LiCoO 2 For the research object, the specific preparation method of this battery electrode sheet includes the following steps:

[0058] Step 1: Add 200g LiCoO 2 And 15g acetylene black conductive agent, uniformly dispersed in 200g N-methylpyrrolidone (NMP) solvent to prepare LiCoO 2 -Conductive agent mixture.

[0059] The second step: add 20g polyvinylidene fluoride (PVDF) binder to mix the slurry, stir at a high speed of 4000 revolutions per minute, and pause for 10 minutes every 10 minutes. The high-speed stirring time is not less than 2 hours. The entire slurry is fully mixed and uniform, and the viscosity of the slurry is 480C.PS.

[0060] The third step: coating the prepared slurry on a coating machine, leaving it to stand for 1 hour and then drying, and the dry thickness of the electrode sheet is controlled between 60 μm and 120 μm.

[0061] The fourth step: use a rolling machine to press the prepared electrode sheet to a porosity of about 35%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a lithium ion battery and its preparing method, especially to a battery slice with good mechanical property, smooth electrochemistry process and good cycling stability and a preparation method thereof and a battery made thereby. The battery electrode slice comprises an afflux medium and a coating layer containing an electrode active matter and an auxiliary material, wherein the electrode active matter is distributed in a state that the granularity and the content are gradually decreasing from the afflux medium to outside in the coating layer. The preparation method comprises: (1) preparing a mixture of the electrode active matter and the auxiliary; (2) adding an adhesive, mixing uniformly and pulping; (3) coating the obtained slurry on the afflux medium to form the coating layer, enabling the coating layer internal to form the active matter gradient distribution through sedimentation and drying; (4) pressing the obtained electrode slice by a roller press. The invention also relates to the battery made by the battery slice from the invention.

Description

technical field [0001] The invention relates to a lithium ion battery and a preparation method thereof, in particular to a battery electrode sheet with good mechanical properties, smooth electrochemical process and good cycle stability, a preparation method thereof and a battery made of the same. Background technique [0002] Based on its superior performance, lithium-ion batteries represent the development trend of batteries for portable electronic products in the future. The market capacity has maintained 100% growth for many years since its inception. Lithium-ion batteries have the advantages of high working voltage, high volume and weight energy density, long life, low self-discharge rate, no memory effect, and little pollution to the environment. They have been widely used in mobile communication equipment, notebook computers, digital cameras, digital cameras etc. With the gradual intensification of the energy crisis and the enhancement of public awareness of environme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/02H01M4/04H01M10/36H01M10/40
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 郑洪河邓永红毛玉华覃九三
Owner SHENZHEN CAPCHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap