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Lithium-ion electrode material and lithium-ion power battery

A technology for electrode materials and power batteries, applied in battery electrodes, secondary batteries, non-aqueous electrolyte battery electrodes, etc., can solve the problems of low battery power density, achieve the effects of extended safety, long cycle life, and improved safety performance

Inactive Publication Date: 2014-01-15
SHENZHEN HAIYING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of researching the present invention, the inventors found that the prior art power lithium-ion battery mainly has the problem of low battery power density

Method used

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  • Lithium-ion electrode material and lithium-ion power battery
  • Lithium-ion electrode material and lithium-ion power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a lithium-ion battery, which includes a battery core, an electrolyte, and a casing. Wherein, the electric core body and the electrolyte are packaged in the casing, and the electric core body is soaked in the electrolyte.

[0046] The cell body is composed of a positive electrode sheet, a negative electrode sheet and a separator, and the separator is spaced between any adjacent positive electrode sheet and negative electrode sheet.

[0047] The positive electrode material is respectively coated and fixed on the surface of each positive electrode sheet of the cell body, and the positive electrode material is composed of lithium iron phosphate, a conductive binder, polyvinylidene fluoride, and carbon nanotubes. The mass percentage of each component is as follows: lithium iron phosphate: 93%, conductive binder (sulfonic acid-based conductive polymer is selected): 1.5%, polyvinylidene fluoride: 2.5%, carbon nanotube: 3%.

[0048] The negative electr...

Embodiment 2

[0054] This embodiment provides a lithium-ion battery, the structure of which is the same as that of Embodiment 1, and the main difference from Embodiment 1 is that the components of the positive electrode material and negative electrode material coated on the positive electrode sheet and the negative electrode sheet are different.

[0055] The positive electrode material is composed of lithium iron phosphate, conductive binder, polyvinylidene fluoride, conductive carbon black, and carbon nanotubes.

[0056] The mass percentage of each component is as follows: lithium iron phosphate: 94%, conductive binder (select sulfonic acid-based conductive polymer): 1.0%, polyvinylidene fluoride: 2.0%, carbon nanotube: 2.5%; conductive carbon black : 0.5%.

[0057] The negative electrode material is coated and fixed on the negative electrode sheet, and the negative electrode material is composed of lithium titanate, conductive binder, polyvinylidene fluoride, conductive carbon black, and ca...

Embodiment 3

[0061] This embodiment provides a lithium ion battery, the structure of which is the same as that of Embodiment 1, and the difference from Embodiments 1 and 2 mainly lies in the different components of the positive electrode material and negative electrode material coated on the positive electrode sheet and the negative electrode sheet.

[0062] The positive electrode material is composed of lithium iron phosphate, conductive binder, polyvinylidene fluoride, conductive carbon black, and carbon nanotubes.

[0063] The mass percentage of each component is as follows: lithium iron phosphate: 95%, conductive binder: 0.5%, polyvinylidene fluoride: 1.5%, carbon nanotube: 0.5%; conductive carbon black: 2.5%.

[0064] The negative electrode material is coated and fixed on the negative electrode sheet, and the negative electrode material is composed of lithium titanate, conductive binder, polyvinylidene fluoride, conductive carbon black, and carbon nanotubes.

[0065] The mass percenta...

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Abstract

The invention relates to the field of lithium batteries, and discloses a lithium-ion electrode material and a lithium-ion power battery. The lithium-ion electrode material is composed of the following constituents at a mass ratio: 93%-95% of active substance, 0.5%-1.5% of conductive binder, 1.5%-2.5% of polyvinylidene fluoride, 0.5%-3% of carbon nano tube and 0%-2.5% of conductive carbon black. Application of the technical scheme of the embodiment is beneficial to improvement on the rate capability, safety and service life of the battery.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium ion electrode material and a lithium ion power battery. Background technique [0002] Lithium secondary battery is a new type of chemical power source, which is mainly composed of positive electrode, battery separator, negative electrode, electrolyte and shell. [0003] Due to the advantages of high working voltage, high specific energy density, long cycle life, low self-discharge rate, no memory effect and low environmental pollution, lithium secondary batteries are widely used in communication equipment, mobile electronic equipment, electric tools, electric toys and aircraft models. It has been rapidly applied and popularized. In recent years, power lithium secondary batteries have gradually been applied in large-scale energy storage facilities, electric bicycles, electric motorcycles and even electric vehicles. [0004] With the popularization of various electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/13H01M10/0525
CPCH01M4/485H01M4/505H01M4/5825H01M4/622H01M4/624H01M4/625H01M10/0525Y02E60/10
Inventor 陶芝勇郭永兴曾纪术曾坚义
Owner SHENZHEN HAIYING TECH
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