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Polymer lithium ion battery and preparation method thereof

A lithium-ion battery and polymer technology, which is applied in the manufacture of electrolyte batteries, batteries, battery electrodes, etc., can solve the problems of fixed battery shape, increase battery thickness, and inability to design batteries, achieve good electrical conductivity, avoid internal short circuits, and prepare simple craftsmanship

Inactive Publication Date: 2017-05-24
ZHEJIANG RES INST OF CHEM IND CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patents CN201310440218.4 and CN201410378688.7 disclose that when preparing a flexible lithium-ion battery, the active electrode material is coated on the current collector in the form of a micro-unit array, and the separator and liquid electrolyte are still used in the battery. This design can Improve the flexibility and bending resistance of the battery, but the improvement effect is limited, and the shape of the battery is relatively fixed
[0007] Although the prior art has made some improvements to the flexibility and bending resistance of lithium-ion batteries, the following problems are still unresolved, for example: ① most of them use traditional copper foil or aluminum foil current collectors, and print active materials on the current collectors, The flexibility of the battery is limited; ② most of them use liquid electrolyte and diaphragm, the shape of the battery is relatively fixed, and the shape of the battery cannot be randomly designed according to the requirements of the electrical device, and the battery has hidden dangers such as liquid leakage; ③ most of them use aluminum-plastic composite film as the exterior The packaging film increases the thickness of the battery and limits the shape of the battery

Method used

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  • Polymer lithium ion battery and preparation method thereof
  • Polymer lithium ion battery and preparation method thereof
  • Polymer lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of positive electrode layer

[0054] Polyester (PET) is selected as the base material, and the positive electrode current collector slurry formula is prepared according to the following mass ratio: carbon powder: polyvinylidene fluoride (PVDF) = 97:3, NMP is the solvent, the solid content is 50%, and the mixture is uniformly stirred at high speed , Vacuum or static degassing to make a slurry-like positive electrode current collector slurry, use a 230-mesh screen printing plate to print the current collector slurry on the PET substrate, and dry.

[0055] The positive electrode material slurry formula is prepared according to the following mass ratio: lithium cobaltate: PVDF: conductive carbon black (SP) = 94:3:3, NMP is the solvent, the solid content is 70%, high-speed stirring is uniform, vacuum or static degassing Finally, a paste-like positive electrode material slurry was prepared, and a 110-mesh screen printing plate was used to print the positive el...

Embodiment 2

[0064] (1) Preparation of positive electrode layer

[0065] Polypropylene (PP) is selected as the base material, and the positive electrode current collector slurry formula is prepared according to the following mass ratio: silver powder: polyvinylidene fluoride (PVDF) = 97:3, NMP is the solvent, the solid content is 65%, and the high-speed stirring is uniform, Vacuum or static degassing to make slurry-like positive electrode current collector slurry, use a 110-mesh screen printing plate to print the current collector slurry on the PP substrate, and dry.

[0066] The positive electrode material slurry formula is prepared according to the following mass ratio: lithium nickel cobalt aluminate: PVDF: conductive carbon black (SP) = 94:3:3, NMP is the solvent, the solid content is 70%, high-speed stirring is uniform, vacuum or standing After degassing, a slurry-like positive electrode material slurry was prepared, and a 110-mesh screen printing plate was used to print the positive ...

Embodiment 3

[0075] (1) Preparation of positive electrode layer

[0076] The aluminum-plastic composite film is selected as the base material, and the positive electrode current collector slurry formula is prepared according to the following mass ratio: graphene: polyvinylidene fluoride (PVDF) = 96:4, NMP is the solvent, the solid content is 55%, and the high-speed stirring is uniform, Vacuum or static degassing to make slurry positive electrode current collector slurry, use 230 mesh screen printing plate to print the current collector slurry on the aluminum-plastic composite film substrate, and dry.

[0077] The positive electrode material slurry formula is prepared according to the following mass ratio: nickel cobalt lithium manganate: PVDF: conductive carbon black (SP) = 94:3:3, NMP is the solvent, the solid content is 70%, high-speed stirring is uniform, vacuum or standing After degassing, a slurry-like positive electrode material slurry was prepared, and a 110-mesh screen printing pla...

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Abstract

The invention discloses a polymer lithium ion battery. The polymer lithium ion battery comprises a positive electrode layer, a gel electrolyte layer and a negative electrode layer, wherein the positive electrode layer comprises a base material, a positive current collector and a positive material, the gel electrolyte layer comprises a macromolecular polymer, a lithium salt, an organic solvent and a functional additive, and the negative electrode layer comprises a base material, a negative current collector and a negative material. The invention also provides a preparation method of the polymer lithium ion battery. A preparation process provided by the invention is simple and low-cost; the prepared polymer lithium ion battery has the characteristics of flexibility, light weight, thinness and variable shapes, and is suitable for being used in the field of wearable devices and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery manufacturing, and in particular relates to a preparation method of a polymer lithium ion battery. Background technique [0002] Due to the advantages of high working voltage, high energy density, low self-discharge rate, no memory effect, long cycle life and no pollution, lithium-ion batteries are widely used in various fields of daily life, including various portable electronic devices and electric vehicles, etc. . With the rapid development of wearable technology, Internet of Things technology, RFID radio frequency and other technologies, people's demand and requirements for batteries used in this technology are also getting higher and higher. The power supply provides energy for smart devices, realizes the application of science and technology, and provides safe and reliable services for human beings. However, due to the use of liquid electrolyte and conventional current collecto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058H01M10/0565H01M4/66
CPCH01M4/66H01M4/661H01M4/663H01M4/666H01M4/669H01M10/0525H01M10/0565H01M10/058H01M2220/00H01M2220/30H01M2300/0085Y02E60/10Y02P70/50
Inventor 王传水陈慧闯董经博
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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