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Making method of gel-electrolyte lithium ion battery

A technology of gel electrolyte and manufacturing method, which is applied in the field of preparation of gel electrolyte lithium-ion batteries, can solve problems such as low cycle life and poor safety performance, and achieve long cycle life, good safety and stability, and shape The effect of strong plasticity

Inactive Publication Date: 2013-12-18
万向电动汽车有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the traditional lithium battery liquid electrolyte, such as low cycle life and poor safety performance, the present invention proposes a method for manufacturing a gel electrolyte lithium ion battery, which improves the shortcomings of the current liquid electrolyte lithium ion battery , providing a gel electrolyte lithium-ion battery with high safety performance and good cycle performance

Method used

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  • Making method of gel-electrolyte lithium ion battery
  • Making method of gel-electrolyte lithium ion battery
  • Making method of gel-electrolyte lithium ion battery

Examples

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Embodiment 1

[0025] (1) Preparation of positive pole piece: 4500g of lithium iron phosphate, 225g of conductive agent SP (conductive carbon black), 275g of binder PVDF (polyvinylidene fluoride) according to the mass percentage of 90%, 4.5%, 5.5% Mix it with 7500g of N-methylpyrrolidone solvent to make a slurry with a solid content of 40%. Coat the slurry on both sides of the aluminum foil, dry it at 110°C, and roll it. After rolling, the thickness is 162μ The pole piece, its compaction density is 2.2g / cm 3 , to obtain the positive pole piece.

[0026] (2) Preparation of the negative pole piece: 3318g of the mixture of artificial graphite and natural graphite, 42g of conductive agent SP (conductive carbon black), 52.5g of sodium carboxymethylcellulose CMC, and 87.5g of styrene-butadiene rubber SBR according to the mass percentage The content is 94.8%: 1.2%, 1.5%, 2.5% are mixed with deionized water to make a slurry, the solid content of the negative electrode slurry is 35%, and the slurry ...

Embodiment 2

[0031] (1) Preparation of positive pole piece: 5400g of lithium iron phosphate, 300g of conductive graphite as conductive agent, 300g of binder PVDF (polyvinylidene fluoride) according to the mass ratio of 90%:5%:5% and N-methylpyrrolidone Mix 7333g of solvents to make a slurry with a solid content of 45%. The slurry is coated on both sides of the aluminum foil, dried at 150°C, and rolled to obtain a pole piece with a thickness of 120μ. Solid density is 2.0g / cm 3 , to obtain the positive pole piece.

[0032] (2) Preparation of the negative pole piece: 3800g of the mixture of artificial graphite and natural graphite, 40g of conductive graphite as a conductive agent, 60g of sodium carboxymethyl cellulose CMC, and 100g of styrene-butadiene rubber SBR according to the mass ratio of 95%: 1%: 1.5% : 2.5% is mixed with 5524g of deionized water to make a slurry. The solid content of the negative electrode slurry is 42%. The slurry is evenly coated on both sides of the copper foil, drie...

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PUM

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Abstract

The invention relates to the technical field of a lithium ion battery; in order to solve the disadvantages that in the prior art lithium ion battery liquid electrolytes are easy to show short cycle life, poor safety performance and the like, the invention provides a making method of a gel-electrolyte lithium ion battery; the gel-electrolyte lithium ion battery comprises a casing, a positive plate, a negative plate, a gel electrolyte and a diaphragm; the gel-electrolyte lithium ion battery improves the shortcomings of liquid-electrolyte lithium ion batteries in the prior art; and the gel-electrolyte lithium ion battery having a higher safety performance and good cycle performance is provided.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a gel electrolyte lithium ion battery. Background technique [0002] The problem of energy shortage is an important problem facing the harmonious development of human society today. Oil resources are not unlimited because of their reserves. At present, under the condition that the world's energy consumption is dominated by oil, if the energy consumption structure does not change, there will be energy shortages. crisis, so the task of finding alternatives to non-renewable fossil energy cannot wait. In addition, with the continuous advancement of science and technology and the gradual improvement of human material culture, people's demand for scientific and technological products is also increasing. The development of the new generation of information technology industry directly depends on the technological progress and product updates of the...

Claims

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Application Information

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IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 付正伟陈军
Owner 万向电动汽车有限公司