High-specific-area carbon/metallic oxide composite electrode material of lithium battery, electrode and preparation methods for high-specific-area carbon/metallic oxide composite electrode material and electrode

A high specific surface area, composite electrode technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of low cycle life, low capacity stability, etc., to improve uniformity, increase structural stability, and improve capacity reversibility and stability effects

Active Publication Date: 2012-07-11
柔电(武汉)科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a high specific surface area carbon/metal oxide composite electrode material and an electrode made of a hi

Method used

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  • High-specific-area carbon/metallic oxide composite electrode material of lithium battery, electrode and preparation methods for high-specific-area carbon/metallic oxide composite electrode material and electrode
  • High-specific-area carbon/metallic oxide composite electrode material of lithium battery, electrode and preparation methods for high-specific-area carbon/metallic oxide composite electrode material and electrode

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preparation example Construction

[0028] al 2 o 3 The preparation process of the adhesive layer is:

[0029] 1. Put graphene powder in the ALD reactor, then inject TMA reaction gas into the reaction vessel until the air pressure reaches 1Torr, then close all reactor valves and let it stand for 90-180 seconds, preferably 120 seconds;

[0030] 2. Vacuumize to 0.1 Torr to discharge excess TMA, and let stand for 90-180 seconds, preferably 120 seconds;

[0031] 3. Inject water vapor until 1Torr. Then close the valves of all reactors and let stand for 120 seconds;

[0032] 4. Vacuum the excess water until the air pressure reaches 0.1 Torr, and let it stand for 90-180 seconds, preferably 120 seconds.

[0033] The above four steps 1-4 are called an ALD cycle. Typical Al 2 o 3 The growth rate was 1.1 to 1.2 angstroms per cycle. The number of cycles can be determined according to the needs, so that Al 2 o 3 The thickness is about 0.1-0.5nm. ALD growth is in the range of 120-180°C. The reaction furnace is rot...

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Abstract

The invention relates to a high-specific-area carbon/metallic oxide composite electrode material of a lithium battery, an electrode and preparation methods for the high-specific-area carbon/metallic oxide composite electrode material and the electrode. A metallic oxide is deposited on high-specific-area carbon powder by using an atomic layer deposition method, and the mass ratio of a metallic oxide film to high-specific-area carbon is between 70 percent and 90 percent. The invention also provides a method for preparing the high-specific-area carbon/metallic oxide composite electrode material by using the atomic layer deposition method, and a method for preparing the electrode by using the high-specific-area carbon/metallic oxide composite electrode material. The high-specific-area carbon/metallic oxide composite electrode material has a high-mass-ratio characteristic, and the lithium battery prepared from the high-specific-area carbon/metallic oxide composite electrode material has a long cycle life and high capacitance stability.

Description

technical field [0001] The invention relates to a high specific surface area carbon / metal oxide composite electrode material for a lithium ion battery, an electrode and a preparation method thereof. Background technique [0002] Lithium battery is the core component of current electric vehicles. As a green energy with relatively mature technology, it has received more and more attention. A hybrid system composed of supercapacitors and lithium batteries can combine the advantages of both to achieve high-power and high-energy storage. For example, in electric vehicles, supercapacitors can provide energy during acceleration and climbing, and store the energy of motor reversal during braking; while lithium batteries provide energy for continuous long-distance driving. However, lithium batteries still face many problems, one of the biggest problems is the capacity and stability of the electrodes. In traditional lithium battery anodes, graphite is usually used as a material, and...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/131H01M4/62H01M4/1391
CPCY02E60/122Y02E60/10
Inventor 吴杭春
Owner 柔电(武汉)科技有限公司
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