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Method for manufacturing polymer lithium ion battery cathode and polymer lithium ion battery

A lithium-ion battery and manufacturing method technology, applied in the direction of electrode manufacturing, electrolyte storage battery manufacturing, battery electrodes, etc., can solve the problems of long operation steps, unfavorable industrialization, low solubility, etc., to improve capacity and cycle performance, The effect of controlling battery thickness and improving safety performance

Inactive Publication Date: 2010-09-29
TIANJIN LISHEN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However Li 2 CO 3 Solubility in organic electrolyte solvents is very low, so practical application is difficult
[0008] Describe in Electrochemistry Communications5 (2003) 979982 Li 2 CO 3 The additive is coated on the surface of natural graphite, which improves the storage performance of the battery and improves the cycle performance of the battery, but the operation steps are too time-consuming, which is not conducive to industrialization

Method used

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  • Method for manufacturing polymer lithium ion battery cathode and polymer lithium ion battery
  • Method for manufacturing polymer lithium ion battery cathode and polymer lithium ion battery
  • Method for manufacturing polymer lithium ion battery cathode and polymer lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Negative electrode preparation:

[0048] (1) First, mix 2000 g of mesocarbon microspheres (MCMB) and 89 g of conductive carbon black evenly, add 400 g of deionized water and stir for 1 hour to form a negative electrode slurry.

[0049] (2) 2.5gLi 2 CO 3 Dissolve in 200g deionized water, stir until it is completely dissolved, mix with the negative electrode slurry obtained in step (1), and continue stirring for 1 hour to obtain a mixed slurry.

[0050] (3) 60g of CMC was dissolved in 2000g of deionized water, stirred for 3 hours to obtain a colorless transparent glue.

[0051] (4) CMC glue solution is joined in the mixed slurry that step (3) obtains, add 180g solid content and be 40% SBR latex mixing and stirring after 2 hours, add deionized water and adjust slurry viscosity to 3000cp, solid content is 48wt%.

[0052] (5) Evenly coat the slurry prepared in step (4) on the copper current collector with a scraper, and compact it after drying at 100°C. The compacted den...

Embodiment 2

[0063] Negative electrode preparation:

[0064] (1) First, mix 2000 g of mesocarbon microspheres (MCMB) and 89 g of conductive carbon black evenly, add 400 g of deionized water and stir for 1 hour to form a negative electrode slurry.

[0065] (2) 2.5g Li 2 CO 3 Dissolve in 200g deionized water, stir until it is completely dissolved, mix with the negative electrode slurry obtained in step (1), and continue stirring for 1 hour to obtain a mixed slurry.

[0066] (3) 60g of CMC was dissolved in 2000g of deionized water, stirred for 3 hours to obtain a colorless transparent glue.

[0067] (4) CMC glue solution is joined in the mixed slurry that step (3) obtains, add 180g solid content and be 40% SBR latex mixing and stirring after 2 hours, add deionized water and adjust slurry viscosity to 3000cp, solid content is 48wt%.

[0068] (5) Evenly coat the slurry prepared in step (4) on the copper current collector with a scraper, and compact it after drying at 100°C. The compacted de...

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Abstract

The invention discloses a manufacture method of polymer lithium iron battery cathode and polymer lithium iron battery, which aims to provide a manufacture method of cathode and battery preventing decomposition of passive film at the cathode surface and inhibiting secondary reaction between electrolyte solvent as well as anode and cathode, reducing the generation of gases and preventing battery deformation at high temperature. The cathode manufacture method includes the following steps: mixing the cathode active material and a conductive agent evenly; adding deionized water to prepare cathode slurry material; dissolving Li2CO3 additive in the deionized water to prepare a solution with a percentage concentration by weight of 0.3-1.5%; adding the solution containing Li2CO3 in the cathode slurry material to prepare a mixed slurry material; wholly dissolving a caking agent in a solvent, adding in the mixed slurry material for even stirring, coating on the surface of copper-collected fluid,and then drying, pressing and cutting to prepare the cathode for polymer lithium iron battery.

Description

technical field [0001] The invention relates to a negative electrode of a polymer lithium ion battery and a manufacturing method of the polymer lithium ion battery, in particular to a manufacturing method of the negative electrode of the polymer lithium ion battery and the polymer lithium ion battery suitable for high temperature environments. Background technique [0002] With the continuous development of science and technology, new electronic devices have an increasingly urgent demand for high-energy rechargeable batteries, and environmental protection also puts forward new requirements for batteries. At present, secondary rechargeable batteries mainly include lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries and fuel cells. Among them, lithium-ion batteries have the advantages of high voltage, many cycle times, and long storage time. They are recognized as efficient green energy sources, so they have developed rapidly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M10/38H01M10/0525H01M4/1391H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 黄庆华高俊奎
Owner TIANJIN LISHEN BATTERY
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