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Carbon nanotube lithium battery

A technology of lithium-ion batteries and carbon nanotubes, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unstable active material structure, reduced battery cycle performance, and small battery capacity, so as to improve cycle performance and capacity Effect of improvement, magnification improvement

Inactive Publication Date: 2012-10-31
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] Embodiment 1, the positive electrode active material accounts for 95% by weight, the carbon nanotube accounts 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 nanotube The tube accounted for 0.6% by weight, and the adhesive accounted 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] Embodiment 2, the positive electrode active material accounts for 96.5% by weight, the carbon nanotube accounts 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 nanotube 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] Embodiment 3, the positive electrode active material accounts for 98% by weight, the carbon nanotube accounts 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 nanotube The tube accounted for 0.4% by weight, and the adhesive accounted 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, carbon nanotubes are used as the conductive agent. With the same weight, its conductivity is 10 times that of the traditional conductive agent. With the reduction of the content of the conductive agent, the required adhesive can also be reduced at the same time. The conductive agent and The reduction of the content of the binder can greatly increase the proportion of the positive and negative active materials in the proportion, so that the capacity of the battery can be greatly increased w...

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PUM

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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 severe challenges facing human existence. Finding clean, renewable, and resource-saving secondary energy is an urgent task to achieve 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 in the power supply of portable electrical appliances such as wireless communications, digital cameras, and notebook computers, and has a wide range of electric power sources for mopeds, electric bicycles, electric motorcycles, miner's lamps, electric tools, hybrid electric vehicles, and pure electric vehicles. application prospects. [0003] Currently commercialized lithium ion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M4/38H01M4/62H01M4/485
CPCY02E60/12Y02E60/122Y02E60/10
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