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Preparation method of CuMn2O4/CNT (carbon nano tube) composite electrocatalyst

An electrocatalyst and conductive agent technology, applied in circuits, electrical components, battery electrodes, etc., to achieve the effects of improved electrochemical stability, easy implementation, and mild experimental conditions

Active Publication Date: 2017-06-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, on the composite CuMn 2 o 4 The preparation and performance of CNT / CNT composite electrocatalysts have not been reported yet

Method used

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  • Preparation method of CuMn2O4/CNT (carbon nano tube) composite electrocatalyst
  • Preparation method of CuMn2O4/CNT (carbon nano tube) composite electrocatalyst
  • Preparation method of CuMn2O4/CNT (carbon nano tube) composite electrocatalyst

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Embodiment 1

[0025] 1), weigh 3.14g Cu(NO 3 ) 2 ·3H 2 O, 4.27g Mn(NO 3 ) 2 4H 2 O and 10g glycine, add 500mL deionized water, stir until completely dissolved, and obtain solution A. Weigh 10g of citric acid and set aside. Put solution A in a water bath at 80°C, then add citric acid to the solution in batches while stirring, and finish adding within about 1 hour. Continue to stir until it forms a gel. Put the formed wet gel into an oven at 250° C., and dry it for 1 hour to obtain a dry gel. Grind the obtained xerogel and put it into a muffle furnace for calcination for 5 hours to obtain CuMn with spinel structure 2 o 4 .

[0026] 2), the prepared CuMn in step 1 2 o 4 Mix with conductive agent CNT, the two components 100mg according to a certain ratio (80% CuMn 2 o 4 : 20% CNT) was dissolved in 100ml ethanol, ultrasonically dispersed for 10min, then dispersed twice with cell crushing (power 1100W), centrifuged at low speed (4500rpm), washed with water for many times, vacuum dri...

Embodiment 2

[0032] 1), weigh 3.14g Cu(NO 3 ) 2 ·3H 2 O, 4.27g Mn(NO 3 ) 2 4H 2 O and 10g glycine, add 500mL deionized water, stir until completely dissolved, and obtain solution A. Weigh 10g of citric acid and set aside. Put solution A in a water bath at 80°C, then add citric acid to the solution in batches while stirring, and finish adding within about 1 hour. Continue to stir until it forms a gel. Put the formed wet gel into an oven at 250° C., and dry it for 1 hour to obtain a dry gel. Grind the obtained xerogel and put it into a muffle furnace for calcination for 5 hours to obtain CuMn with spinel structure 2 o 4 .

[0033] 2), the prepared CuMn in step 1 2 o 4 Mix with conductive agent CNT, the two components 100mg according to a certain ratio (80% CuMn 2 o 4 : 20% CNT) was dissolved in 100ml ethanol, ultrasonically dispersed for 10min, then dispersed twice with cell crushing (power 1100W), centrifuged at low speed (4500rpm), washed with water several times, and vacuum-...

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Abstract

The invention relates to a preparation method of a CuMn2O4 / CNT (carbon nano tube) composite electrocatalyst and belongs to the field of composites. The preparation method comprises the steps: preparing CuMn2O4 with a spinel structure by a sol gel method, and compounding prepared CuMn2O4 with CNT having excellent performance to prepare the high-efficiency electrocatalyst. The preparation method has the advantages that the method has the simple steps, makes full use of raw materials and is ingenious in design. In addition, CuMn2O4 with the spinel structure prepared by the method has a bright and unique spinel structure pattern characteristic; after CuMn2O4 is compounded with the conduction agent CNT, the electrocatalyst shows better catalytical performance for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR); and the electrocatalyst can be applied to fuel cells and metal-air cells as a bifunctional electrocatalyst and has wide application prospects.

Description

technical field [0001] The present invention relates to a kind of preparation method of CuMn2O4 / CNT composite electrocatalyst, relate in particular to the copper manganese oxide (CuMn 2 o 4 The invention discloses a method for preparing a high-efficiency bifunctional electrocatalyst of a composite carbon nanotube (CNT), belonging to the field of composite materials. Background technique [0002] Two very important reactions in energy conversion and storage involving oxygen electrochemistry are the oxygen reduction reaction and the oxygen evolution reaction. At present, noble metal catalysts (Pt / C) are mainly used to improve the slow reaction process of oxygen reduction and oxygen evolution, but the characteristics of noble metal catalysts, such as high cost and limited reserves, restrict the practical application of energy storage devices such as fuel cells and metal-air batteries. Therefore, it is necessary to develop non-noble metal catalysts for oxygen reduction and oxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9016H01M4/9083Y02E60/50
Inventor 乔金硕王芳王珺刘俊飞孙克宁孙旺
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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