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Method for preparing porous mold charcoal/metal oxide composite material for super capacitor electrode

A technology of supercapacitors and composite materials, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, oxide conductors, etc., can solve the problems of unfavorable production and practical application, high cost, complicated preparation process of porous molded carbon, etc. Achieve the effect of increasing output specific capacity, improving conductivity, and abundant sources

Inactive Publication Date: 2013-01-02
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

But until now, the preparation process of artificially synthesized porous carbon is still quite complicated, and the cost is high, which is not conducive to large-scale industrial production and practical application.

Method used

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preparation example Construction

[0013] The present invention is a method for preparing porous shaped charcoal / metal oxide composite materials for supercapacitor electrodes. The steps are: direct carbonization of wood blocks to prepare porous shaped charcoal, and then electrochemical deposition and chemical deposition methods to prepare porous The specific steps for forming a charcoal / metal oxide composite material are:

[0014] (1) Cut the wooden block into a rectangular parallelepiped of 2cm, 1cm and 0.3cm in length, width and height;

[0015] (2) Transfer the above-mentioned small wooden block to the crucible and place it in the tube furnace;

[0016] (3) Use a vacuum pump to extract the air in the quartz tube so that its internal pressure is less than 10 Pa;

[0017] (4) Pour inert N2 into the vacuum tube to normal pressure, and then use a mass flow meter to control the gas flow to 70~80mL / s;

[0018] (5) Start heating at a heating rate of 3°C / min to a temperature of 900°C in the tube, and keep it warm for 6 hours...

Embodiment 1

[0022] Example 1: Preparation of porous shaped charcoal

[0023] (1) Cut the wooden block into a rectangular parallelepiped with a length, width and height of 2cm, 1cm, and 0.3cm;

[0024] (2) Transfer the above-mentioned small wooden block to the crucible and place it in the tube furnace;

[0025] (3) Use a vacuum pump to extract the air in the quartz tube so that its internal pressure is less than 10 Pa;

[0026] (4) Pour inert N into the vacuum tube 2 To normal pressure, then use a mass flow meter to control the gas flow to 70~80mL / s;

[0027] (5) Start the temperature rise at a heating rate of 3°C / min until the temperature in the tube reaches 900°C, and keep it warm for 6 hours to completely carbonize the wood block to obtain porous shaped charcoal.

Embodiment 2

[0028] Example 2: Preparation of porous shaped charcoal / cobalt hydroxide composite material

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Abstract

The invention provides a method for preparing a porous mold charcoal / metal oxide composite material for a super capacitor electrode. The method comprises the following steps: preparing the porous mold charcoal by adopting a wood block direct carbonizing method; and preparing a porous mold charcoal / metal oxide composite material by adopting an electromechanical deposition method and a chemical deposition method. The porous mold charcoal has wide sources, simple preparation process and porous structure, has very high specific capacity after the porous mold charcoal is compounded with the metal oxide and hydroxide; and the composite material has simple preparation process, and is suitable for large-scale production application. The electrode can be directly made of the prepared composite material without adding graphite, polymer adhesive and other additives, so that the conductivity of the electrode can be improved, the output specific capacity of the capacitor can be remarkably improved. The method has remarkable effect in improving the specific volume of the composite material.

Description

Technical field [0001] The invention relates to a method for preparing a composite material for supercapacitor electrodes. Background technique [0002] Supercapacitors are a new type of energy storage device between batteries and traditional capacitors that have emerged in recent years. They have high specific power, light weight, fast charge and discharge, long cycle life, wide operating temperature range and low pollution. Many advantages have received widespread attention. Supercapacitors are mainly divided into electric double layer supercapacitors and redox supercapacitors. The specific capacity of an electric double-layer supercapacitor is mainly determined by the surface area of ​​the material, and its theoretical capacity is directly proportional to the specific surface area of ​​the electrode material. Currently, activated carbon or carbon nanotubes are mainly used as electrode materials, and the specific capacity can reach 200F / g. Supercapacitors using pure activate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/04H01B1/08H01B13/00H01G11/30H01G11/86
CPCY02E60/13
Inventor 孔令斌刘卯成康龙
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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