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Production method of high stability CoSe2 / graphene composite electrode material

A graphene composite and electrode material technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of inconvenient control of reaction ratio, poor crystallinity of particles, low catalytic activity, etc., and achieve high-efficiency electrocatalytic activity , Catalyst cost reduction, synthesis process is simple and easy to operate

Inactive Publication Date: 2015-10-14
SUIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to provide a high stability CoSe 2 / The preparation method of graphene composite electrode material, solves existing technology and prepares CoSe 2 The catalysts that exist with graphene composite electrode materials are expensive, poor in stability and catalytic activity, poor particle crystallinity, inconvenient control of the reaction ratio and complicated processes

Method used

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  • Production method of high stability CoSe2 / graphene composite electrode material
  • Production method of high stability CoSe2 / graphene composite electrode material
  • Production method of high stability CoSe2 / graphene composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: A high stability CoSe 2 The preparation method of / graphene composite electrode material is specifically finished in the following steps:

[0017] 1. Synthesis of graphene oxide: Accurately weigh 200 mg of graphite oxide, disperse it in 100 mL of glucose solution, ultrasonically and centrifuge, and collect the supernatant to obtain graphene oxide solution;

[0018] 2. Prepare the mixed sol of cobalt hydroxide and graphene oxide: Measure 10mL of ethylene glycol, add 1.0mL of low-concentration ammonia water dropwise, stir at a constant speed, dissolve a certain amount of cobalt acetate in the graphene oxide solution, and add it dropwise to B In diol, at 75 ° C, continuous gradient stirring at a constant speed for 1.5 hours, that is, a uniform cobalt hydroxide and graphene oxide mixed sol is formed;

[0019] 3. Constant temperature vacuum aging: vacuum aging for 5 hours, control temperature at 30°C, and vacuum degree of 70Pa;

[0020] 4. Preparation of CoSe ...

Embodiment 2

[0024] Example 2: A high stability CoSe 2 The preparation method of / graphene composite electrode material is specifically finished in the following steps:

[0025] 1. Synthesis of graphene oxide: Accurately weigh 200 mg of graphite oxide, disperse it in 100 mL of glucose solution, ultrasonically and centrifuge, collect the supernatant, and then prepare the graphene oxide solution;

[0026] 2. Prepare the mixed sol of cobalt hydroxide and graphene oxide: Measure 12mL of ethylene glycol, add 1.2mL of low-concentration ammonia water dropwise, stir at a constant speed, dissolve a certain amount of cobalt acetate in the graphene oxide solution, and then add it dropwise to B In diol, at 75 ° C, continuous gradient stirring at a constant speed for 1.0 hour, that is, a uniform mixed sol of cobalt hydroxide and graphene oxide is formed;

[0027] 3. Constant temperature vacuum aging: vacuum aging for 8 hours, control temperature at 45°C, and vacuum degree of 70Pa;

[0028] 4. Prepar...

Embodiment 3

[0032] Example 3: A high stability CoSe 2 The preparation method of / graphene composite electrode material is specifically finished in the following steps:

[0033] 1. Synthesis of graphene oxide: Accurately weigh 200 mg of graphite oxide, disperse it in 100 mL of glucose solution, ultrasonically and centrifuge, collect the supernatant, and then prepare the graphene oxide solution;

[0034] 2. Prepare the mixed sol of cobalt hydroxide and graphene oxide: Measure 15mL of ethylene glycol, add 2.5mL of low-concentration ammonia water dropwise, stir at a constant speed, dissolve a certain amount of cobalt acetate in the graphene oxide solution, and add it dropwise to In diol, at 72 ° C, continuous gradient stirring at a constant speed for 0.5 hours, that is, a uniform mixed sol of cobalt hydroxide and graphene oxide is formed;

[0035] 3. Constant temperature vacuum aging: vacuum aging for 9 hours, control temperature at 60°C, and vacuum degree of 70Pa;

[0036] 4. Preparation of...

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Abstract

The invention discloses a production method of a high stability CoSe2 / graphene composite electrode material. The method comprises the steps: (1), synthesis of graphene oxide; (2) preparation of a cobalt hydroxide and graphene oxide mixed sol; (3) constant temperature vacuum aging; and (4) preparation of a CoSe2 / graphene composite electrode material. The present invention has the advantages of: (1), according to the above preparation method, CoSe2 is uniformly loaded on the graphene surface to achieve synthesis of a high stability CoSe2 / graphene composite electrode material; (2) the synthesis process is simple and easy to operate, and has mild conditions and low cost of raw materials; (3) compared with the existing non-noble metal electrode material, the CoSe2 / graphene composite electrode material prepared by the present invention has high efficiency electro-catalytic activity; and (4), the CoSe2 / graphene composite electrode material prepared by the present invention has good crystallinity, high stability and strong resistance to poison. The high stability CoSe2 / graphene composite electrode material can be used as a cathode catalyst for a polymer electrolyte membrane (PEMFC) fuel cell, has significantly increased catalytic activity in acid medium, reduces catalyst costs, and significantly enhances battery performance.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a high-stability CoSe 2 / The preparation method of graphene composite electrode material. Background technique [0002] Graphene is a new material with a two-dimensional grid structure composed of planar single-layer carbon atoms. It is the basic unit of other carbon allotropes such as wrapped fullerenes, rolled into carbon nanotubes, and stacked into graphite. Graphene has the advantages of large specific surface area, strong electrical conductivity, and high stability. The Pt / graphene catalyst prepared as a carrier has strong corrosion resistance, good electronic conductivity, and high electrocatalytic activity. It is an excellent fuel cell cathode catalyst. However, the scarcity and high price of metal Pt resources have become the bottleneck limiting the large-scale production of PEMFC. Therefore, the study of non-noble metal catalysts with low price and high ca...

Claims

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Application Information

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IPC IPC(8): B01J27/057H01M4/90
CPCY02E60/50
Inventor 赵东江田喜强董艳萍马松艳白晓波迟彩霞田军乔秀丽
Owner SUIHUA UNIV
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