Carbon fiber supported metal catalyst as well as preparation method and application thereof

A technology of supporting metal and carbon fiber, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as unsuitable cost and high temperature, and achieve the effects of not easy migration, high electronic conductivity, and strong quantization effect.

Inactive Publication Date: 2014-01-29
上海氢尚新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain carbon fibers with high degree of graphitization and high conductivity, extremely high temperature (for example: 3000°C) is required, which not only requires special instrument configuration, but also is dangerous, which is not suitable from the perspective of cost

Method used

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  • Carbon fiber supported metal catalyst as well as preparation method and application thereof
  • Carbon fiber supported metal catalyst as well as preparation method and application thereof
  • Carbon fiber supported metal catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Place 1 gram of PAN and 0.02 gram of carbon nanotube (MWCNT) in 10 milliliters of DMF, stir at 30° C. for 3 hours, and prepare a uniform manganese acetate / PAN mixed solution;

[0064] (2) Inject the MWCNT / PAN mixed solution solution obtained in (1) into a disposable syringe for spinning, the voltage is 12KV, the flow rate is 0.15ml / h, the receiving distance is 10cm, and the receiving material is an aluminum sheet;

[0065] (3) Put the MWCNT / PAN nanofibers obtained in (2) into a vacuum oven at 50°C for 6 hours;

[0066] (4) Put the MWCNT / PAN nanofiber obtained in (3) into a ceramic boat, place it in a muffle furnace at 250°C for pre-oxidation and stabilization for 1 hour, and the heating rate is 1°C / min;

[0067] (5) Put the MWCNT / PAN nanofibers obtained in (4) into a quartz tube furnace for carbonization for 0.5h, the carbonization temperature is 900°C, and the heating rate is 1°C / min, and the impurity-free MWCNT / carbon fibers are obtained;

[0068](6) Put 100 mill...

Embodiment 2

[0070] (1) 1.2 grams of PAN, 0.024 grams of graphene are placed in 10 milliliters of DMF, stirred at 40 ° C for more than 20 hours, and a uniform graphene / PAN solution is prepared;

[0071] (2) inject the graphene / PAN solution of (1) gained in disposable syringe, carry out spinning, voltage is 18KV, and flow velocity is 0.18ml / h, and receiving distance is 13cm, and receiving material is aluminum sheet;

[0072] (3) Place the graphene / PAN nanofibers obtained in (2) into a 50° C. vacuum oven for drying for 6 hours;

[0073] (4) Pack the graphene / PAN fiber obtained in (3) into a ceramic boat, and put it directly into a muffle furnace at 250° C. for pre-oxidation stabilization for 4 hours, and the heating rate is 2° C. / min;

[0074] (5) Put the graphene / PAN fiber obtained in (4) into a quartz tube furnace for carbonization for 2h, the carbonization temperature is 900°C, and the heating rate is 2°C / min, and the carbon containing graphene is obtained. Nanofibers;

[0075] (6) Put ...

Embodiment 3

[0077] (1) 1.2 grams of PAN and 0.06 grams of graphite were placed in 10 milliliters of DMF, and stirred at 40° C. for more than 20 hours to prepare a uniform graphite / PAN solution;

[0078] (2) inject the graphite / PAN solution of (1) gained in disposable syringe, carry out spinning, voltage is 18KV, and flow rate is 0.18ml / h, and receiving distance is 13cm, and receiving material is aluminum sheet;

[0079] (3) Put the graphite / PAN nanofiber obtained in (2) into a vacuum oven at 50° C. for 6 hours;

[0080] (4) Put the graphite / PAN fiber obtained in (3) into a ceramic boat, put it directly into a muffle furnace at 250°C for pre-oxidation stabilization for 4 hours, and the heating rate is 2°C / min;

[0081] (5) Put the graphite / PAN fiber obtained in (4) into a quartz tube furnace for carbonization for 2h, the carbonization temperature is 900°C, and the heating rate is 2°C / min, and the carbon nanofiber containing graphite is obtained ;

[0082] (6) Put 100 mg of graphite-conta...

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Abstract

The invention relates to a carbon fiber supported metal catalyst as well as a preparation method and an application thereof. The materials such as graphene nano belt, a multi-arm carbon nano tube and graphene are adopted as graphitization template-based additives, and composite carbon fiber with high graphitization degree and high conductivity is obtained by electrostatic spinning and wet spinning processes and a high-temperature carbonization process, wherein the preferential amount of the template-based additives is 0.5-5% by weight; the high-graphitization composite carbon fiber is used as a carrier of the catalyst, and a metal / carbon nano fiber catalyst for a fuel cell is obtained by reduction; the catalyst has a large initial electrochemical-activity surface area and strong CO toxicity resistance; the current density attenuation is reduced in a 30 minutes of chronoamperometry test, and the catalyst shows higher electrochemical activity, higher current density and better electrochemical stability; and moreover, the catalyst taking the high-graphitization carbon fiber as a carrier shows remarkably high durability.

Description

technical field [0001] The invention relates to a carbon fiber nano-loaded metal catalyst for a fuel cell, in particular to a carbon fiber-loaded metal catalyst and a preparation method and application thereof. Background technique [0002] A fuel cell is an energy conversion device that directly converts the chemical energy of fuel into electrical energy without burning, and plays an important role in the sustainable energy utilization. Catalyst support is one of the key materials for the catalytic layer of low-temperature fuel cells, and it is also a hot spot of scientific research. Preparation of catalysts with high catalytic performance, good resistance to carbon monoxide (CO) toxicity, electrochemical stability, and good durability is one of the key factors for the commercialization of fuel cells. Among them, the catalyst carrier has a great influence on the performance of the catalyst and even determines it. It is one of the key materials for low-temperature fuel cell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/96
CPCY02E60/50H01G11/30H01M4/366H01M4/9083Y02E60/10
Inventor 王超楠张永明袁望章李虹赵丽芳
Owner 上海氢尚新能源科技有限公司
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