A high-power lithium-ion battery

A lithium-ion battery, high-power technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as difficulty in graphene dispersion, achieve strong electronic conductivity, improve cycle life, and strong liquid absorption and retention capabilities Effect

Active Publication Date: 2018-10-09
东莞维科新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technical solution, the structure of graphene can be understood as a single layer of graphite, so it has extremely good electrical conductivity, and the movement speed of electrons reaches 1 / 300 of the speed of light. And the huge specific surface area has more prominent advantages compared to carbon nanotubes or carbon black as conductive agents; and nonylphenol polyoxyethylene ether and monoethanolamine are used to improve the dispersion uniformity of graphene in solvents , to solve the problem of difficulty in partially dispersing graphene;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-power lithium-ion battery, comprising a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte, the positive electrode sheet includes a positive electrode collector and a positive active material arranged on the positive electrode collector, the negative electrode sheet includes a negative electrode collector and The negative electrode active material arranged on the negative electrode current collector, the lithium ion battery includes a graphene composite conductive agent, and the high power lithium ion battery is uniformly dispersed in the positive electrode active material and the negative electrode active material; the graphene composite conductive agent The mass parts of each component are: 120 parts of graphene, 20 parts of Super-p, 10 parts of carbon nanotubes, 30 parts of nonylphenol polyoxyethylene ether, 10 parts of monoethanolamine, 200 parts of solvent, 2 parts of additives, 7 parts of conductive polymer agent, 2 parts of...

Embodiment 2

[0036] A high-power lithium-ion battery, comprising a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte, the positive electrode sheet includes a positive electrode collector and a positive active material arranged on the positive electrode collector, the negative electrode sheet includes a negative electrode collector and The negative electrode active material arranged on the negative electrode current collector, the lithium ion battery includes a graphene composite conductive agent, and the high power lithium ion battery is uniformly dispersed in the positive electrode active material and the negative electrode active material; the graphene composite conductive agent The mass parts of each component are: 130 parts of graphene, 30 parts of Super-p, 12 parts of carbon nanotubes, 37 parts of nonylphenol polyoxyethylene ether, 18 parts of monoethanolamine, 260 parts of solvent, 3 parts of additives, 8 parts of conductive polymer agent, 3 parts of...

Embodiment 3

[0044] A high-power lithium-ion battery, comprising a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte, the positive electrode sheet includes a positive electrode collector and a positive active material arranged on the positive electrode collector, the negative electrode sheet includes a negative electrode collector and The negative electrode active material arranged on the negative electrode current collector, the lithium ion battery includes a graphene composite conductive agent, and the high power lithium ion battery is uniformly dispersed in the positive electrode active material and the negative electrode active material; the graphene composite conductive agent The mass parts of each component are: 150 parts of graphene, 35 parts of Super-p, 15 parts of carbon nanotubes, 45 parts of nonylphenol polyoxyethylene ether, 25 parts of monoethanolamine, 300 parts of solvent, 3 parts of additives, 10 parts of conductive polymer agent, 4 parts o...

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Abstract

The invention relates to a high-power lithium-ion battery, which comprises a positive plate, a negative plate, a membrane and an electrolyte, wherein the lithium-ion battery comprises a graphene composite conductive agent; the high-power lithium-ion battery is evenly dispersed into a positive active material and a negative active material; and the graphene composite conductive agent is prepared from the following components in parts by mass: 120-150 parts of graphene, 20-35 parts of Super-p, 10-15 parts of carbon nanotubes, 30-45 parts of nonylphenol polyoxyethylene ether, 10-25 parts of monoethanolamine, 200-300 parts of solvents, 2-3 parts of assistants, 7-10 parts of conductive polymer agents, 2-4 parts of glass beads and 3-8 parts of acetylacetonate iridium. The graphene is taken as a main component and has excellent conductivity, so that the capacity of the electrode material is improved; the internal resistance of the battery is reduced; the cycle lifetime of the battery is prolonged; the cost is reduced; and the lithium-ion battery has higher competitiveness.

Description

technical field [0001] The invention relates to a lithium-ion battery, in particular to a high-power lithium-ion battery with reduced cost, improved conductivity and cycle life. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy and no memory effect. In recent years, they have been favored by people as a new energy source and have developed rapidly. With the maturity of technology, people's requirements for lithium-ion batteries are also getting higher and higher. [0003] Lithium-ion batteries in the prior art mainly use conductive graphite, acetylene black and carbon nanotubes as conductive agents. Acetylene black is a chain composed of spherical amorphous carbon particles. It is currently the most widely used conductive agent with low price. , but in order to achieve the purpose of enhancing the mutual contact between electrode active materials, the amount of addition required is large, resulting in a decrease in electrode capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/625H01M10/0525Y02E60/10
Inventor 潘美姿张晓艳李文国
Owner 东莞维科新能源有限公司
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