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A kind of gel state polymer lithium-ion battery and manufacturing method thereof

A lithium ion battery and a manufacturing method technology, applied in the field of gel polymer lithium ion battery and its manufacturing, can solve problems such as potential safety hazards, prolong production cycle, increase manufacturing cost, etc., so as to improve production safety and reduce production Difficulty, the effect of improving mechanical strength

Active Publication Date: 2014-10-01
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of battery needs to use a large amount of flammable organic compounds to extract plasticizers in the production process, which increases the difficulty of mass production, increases the production cost, prolongs the production cycle, and has potential safety hazards.

Method used

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  • A kind of gel state polymer lithium-ion battery and manufacturing method thereof
  • A kind of gel state polymer lithium-ion battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Positive electrode slurry preparation and positive electrode sheet production

[0033] The production is completed in the reactor, and the temperature in the reactor is controlled not to be higher than 35°C. 3 grams of PVDF and 2 grams of conductive carbon black are fully dissolved in NMP. Then add 95 grams of lithium cobaltate, after stirring for about 2 hours, add the NMP solution containing 8 grams of methyl methacrylate and 0.1 grams of azobisisobutyronitrile, and continue stirring for about 300 minutes. The required positive electrode sheet can be obtained by coating the required positive electrode slurry on the aluminum foil and baking at 60°C.

[0034] (2) Negative electrode slurry preparation and negative electrode sheet production

[0035] The production is completed in the reactor, and the temperature in the reactor is controlled not to be higher than 35°C. 3 grams of PVDF and 2 grams of conductive carbon black are fully dissolved in NMP. Then add 95 gra...

Embodiment 2

[0041] (1) Positive electrode slurry preparation and positive electrode sheet production

[0042] The production is completed in the reactor, and the temperature in the reactor is controlled not to be higher than 35°C. 3 grams of PVDF and 2 grams of conductive carbon black are fully dissolved in NMP. Then add 95 grams of lithium cobaltate, and after stirring for about 2 hours, add an NMP solution containing 6 grams of methyl methacrylate and 0.12 grams of azobisisobutyronitrile, and continue stirring for about 270 minutes. The required positive electrode sheet can be obtained by coating the required positive electrode slurry on the aluminum foil and baking at 60°C.

[0043] (2) Negative electrode slurry preparation and negative electrode sheet production

[0044] The production is completed in the reactor, and the temperature in the reactor is controlled not to be higher than 35°C. 3 grams of PVDF and 2 grams of conductive carbon black are fully dissolved in NMP. Then add 95...

Embodiment 3

[0050] (1) Positive electrode slurry preparation and positive electrode sheet production

[0051] The production is completed in the reactor, and the temperature in the reactor is controlled not to be higher than 35°C. 3 grams of PVDF and 2 grams of conductive carbon black are fully dissolved in NMP. Then add 95 grams of lithium cobaltate, after stirring for about 2 hours, add the NMP solution containing 4 grams of methyl methacrylate and 0.05 grams of azobisisobutyronitrile, and continue stirring for about 200 minutes. The required positive electrode sheet can be obtained by coating the required positive electrode slurry on the aluminum foil and baking at 60°C.

[0052] (2) Negative electrode slurry preparation and negative electrode sheet production

[0053] The production is completed in the reactor, and the temperature in the reactor is controlled not to be higher than 35°C. 3 grams of PVDF and 2 grams of conductive carbon black are fully dissolved in NMP. Then add 95 gr...

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Abstract

The invention discloses a gel-state polymer lithium-ion battery and a manufacturing method thereof. Under certain conditions, monomers and thermal initiators are added to positive and negative slurry to make positive and negative pole pieces; A layer of polymer glue containing a crosslinking agent is evenly coated on the surface. Assemble the positive and negative pole pieces and separator into a battery cell. The polymer glue sticks the positive and negative pole pieces to the diaphragm, and at the same time, the crosslinking agent undergoes thermal polymerization reaction with the monomer and initiator on the positive and negative pole pieces respectively, and undergoes physical adsorption and chemical reaction with the electrolyte, so that the electrolytic The liquid is fixed to form a gel polymer electrolyte. In addition to the role of the electrolyte, the gel electrolyte also tightly adheres the positive pole piece, the separator and the negative pole piece together, so that the battery core forms a high-strength whole. Since no plasticizer is used in the battery manufacturing process of the present invention, the use of a large amount of flammable organic compounds is avoided, production difficulty is reduced, and production safety is improved.

Description

technical field [0001] The invention relates to a gel-state polymer lithium ion battery and a manufacturing method thereof, belonging to the technical field of chemical power sources. Background technique [0002] In recent years, with the development of science and technology, portable electronic devices such as mobile phones and notebook computers have become popular all over the world. A key component that hinders the development of these devices to miniaturization, portability and durability is their power supply. At present, these power sources generally use organic liquid electrolyte lithium-ion batteries, but because this type of battery contains flowing liquid organic matter, there are safety hazards such as internal short circuit of the battery and electrolyte leakage. The gel polymer battery can solve these problems well, and is more flexible in the design of the battery shape, which can increase the capacity density of the battery, increase the service life of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M4/139H01M4/62
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 王雁生郭也平佟健
Owner EVE ENERGY CO LTD