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Carbon nanotube lithium battery

A lithium-ion battery, carbon nanotube technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unstable active material structure, reduced battery cycle performance, small battery capacity, etc., to improve cycle performance and capacity. The effect of improvement and magnification improvement

Inactive Publication Date: 2010-06-23
东莞市金源电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of traditional conductive agents in existing lithium-ion batteries, their conductivity is poor, and the capacity of batteries is relatively small; using traditional conductive agents, the maximum discharge rate of batteries can only reach 20C; The discharge process has a great influence on the structure of the active material of the battery. The structure of the active material is unstable during the charge and discharge process, and the cycle performance of the battery is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In the first embodiment, the positive electrode active material accounts for 95% by weight, the carbon nanotubes account for 1% by weight, and the binder accounts for 4% by weight; the negative electrode active material accounts for 95% by weight, and the carbon nanotubes account for 95% by weight. The pipe accounts for 0.6% by weight, and the adhesive accounts for 4.4% by weight. In this embodiment, the positive active material is lithium cobalt oxide, and the negative active material is carbon.

Embodiment 2

[0013] In the second embodiment, the positive electrode active material accounts for 96.5% by weight, the carbon nanotubes account for 0.8% by weight, and the binder accounts for 2.7% by weight; the negative electrode active material accounts for 96.5% by weight, and the carbon nanotubes account for 96.5% by weight. The tube accounts for 0.5% by weight, and the adhesive accounts for 3% by weight. In this embodiment, the positive active material is lithium cobalt oxide, and the negative active material is carbon.

Embodiment 3

[0014] In the third embodiment, the positive electrode active material accounts for 98% by weight, the carbon nanotubes account for 0.4% by weight, and the binder accounts for 1.6% by weight; the negative electrode active material accounts for 98% by weight, and the carbon nanotubes account for 98% by weight. The pipe accounts for 0.4% by weight, and the adhesive accounts for 1.6% by weight. In this embodiment, the positive active material is lithium cobalt oxide, and the negative active material is carbon.

[0015] Among them, the use of carbon nanotubes as the conductive agent, the same weight, its conductive performance is 10 times that of the traditional conductive agent, and as the content of the conductive agent decreases, the required adhesive can also be reduced at the same time. The reduction of the binder content can greatly increase the specific gravity of the positive and negative active materials in the ratio, so that the capacity of the battery can be greatly improv...

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Abstract

The invention relates to a carbon nanotube lithium battery, which comprises an anode part and a cathode part, wherein the anode part comprises the following components in percentage by weight: 95-98 percnet of anode active substance, 0.4-2 percent of carbon nanotube and 1.6-4.4 percent of caking agent; and the cathode part comprises the following components in percentage by weight: 95-98 percent of cathode active substance, 0.4-2 percent of carbon nanotube and 1.6-4.4 percent of caking agent. The conductive performance of the carbon nanotube lithium battery is 10 times of the conductive performance of the traditional conductive agent; under the condition of using the same anode and cathode active substances, the capacitance of the battery can be substantially improved; in addition, the multiplying power rate of the carbon nanotube lithium battery can be further improved; and the carbon nanotube lithium battery can improve the stability of the structure in the charging and discharging process of the active substances and greatly improve the circulating performance of the battery.

Description

Technical field [0001] The invention relates to a carbon nanotube lithium ion battery. Background technique [0002] Energy crisis, resource shortage, and environmental pollution are serious challenges facing human survival. Finding clean, renewable, and resource-saving secondary energy sources is an urgent task to be solved to achieve the sustainable development of human society. Lithium-ion batteries have the advantages of high working voltage, high energy density, long cycle life, low self-discharge rate, and environmental protection, and have become the development trend of secondary batteries. It has been widely used as a power source for portable electrical appliances such as wireless communications, digital cameras, notebook computers, etc., and has a wide range of power sources for electric bicycles, electric bicycles, electric motorcycles, miner’s lamps, electric tools, hybrid vehicles, and pure electric vehicles. Application prospects. [0003] Currently commercial lith...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/38H01M4/62H01M4/485
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 王奇志吴治国陈设军杨世权徐多
Owner 东莞市金源电池科技有限公司
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