Method for preparing electrode material molybdate for super capacitor and application thereof

A technology for supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, etc., can solve problems that have not yet been discovered, and achieve the effects of simple synthesis process, excellent supercapacitor performance, and good repeatability

Inactive Publication Date: 2015-08-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, we use oleylamine as the carbon source and use carbon coating to in-situ coat a layer of carbon on the surface of cobalt molybdate and nickel molybdate materials to prepare a composite electrode material. It was found that the method described in this patent was used to prepare carbon-coated cobalt / nickel molybdate and use it as an electrode material for supercapacitors

Method used

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  • Method for preparing electrode material molybdate for super capacitor and application thereof
  • Method for preparing electrode material molybdate for super capacitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve cobalt acetate and sodium molybdate in a solution composed of water and oleylamine at a molar ratio of 1:1.5, the molar concentration of cobalt acetate is 0.05 mol / L, and the molar concentration of sodium molybdate is 0.075 mol / L. The volume of amine accounts for 2% of the solution composed of water and oleylamine. After fully stirring and dissolving, it is transferred to the reaction kettle, 160 o C hydrothermal reaction for 18 h. After the thermal reaction, centrifuge, wash, dry, and then under nitrogen at 350 o C roasting 5h. After cooling to room temperature, the carbon-coated cobalt molybdate electrode material can be obtained after mortar grinding.

Embodiment 2

[0023] Dissolve cobalt nitrate and sodium molybdate in a solution composed of water and oleylamine at a molar ratio of 1:1.5, the molar concentration of cobalt nitrate is 0.05 mol / L, and the molar concentration of sodium molybdate is 0.075 mol / L, in which oil The volume of amine accounts for 8% of the solution formed by water and oleylamine. After fully stirring and dissolving, it is transferred to the reaction kettle, 160 oC Hydrothermal reaction for 18 h. After the thermal reaction, centrifuge, wash, dry, and then under nitrogen at 500 o C roasting 3h. After cooling to room temperature, the carbon-coated cobalt molybdate electrode material can be obtained after mortar grinding.

Embodiment 3

[0025] Cobalt chloride and sodium molybdate are dissolved in the solution that water and oleylamine constitute according to the molar ratio of 1:1.5, the molar concentration of cobalt chloride is 0.05 mol / L, and the molar concentration of sodium molybdate is 0.075 mol / L, Wherein the volume of oleylamine accounts for 5% of the solution that water and oleylamine constitute, after fully stirring and dissolving, transfer to the reactor, 160 o C hydrothermal reaction for 18 h. After the thermal reaction, centrifuge, wash, dry, and then under argon at 450 o C roasting 3h. After cooling to room temperature, the carbon-coated cobalt molybdate electrode material can be obtained after mortar grinding.

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Abstract

The present invention discloses a method for preparing an electrode material molybdate for a super capacitor and the application thereof. The method comprises the steps of dissolving cobalt salt or nickel salt and sodium molybdate in a solution formed by water and oleylamine, carrying out hydrothermal reaction, carrying out centrifugation, washing and drying processing, carrying out calcinations under an inert atmosphere, and carrying out grinding to obtain powder to obtain a carbon-coated molybdate super capacitor electrode material. The carbon-coated cobalt molybdate or nickel molybdate electrode material prepared by the preparation method is applied to the super capacitor, and the method has the advantages of simple synthesis process, good repeated performance and mass production.

Description

technical field [0001] The invention relates to the synthesis of inorganic materials and its application in the field of electrochemistry, in particular to a preparation method and application of molybdate used as an electrode material for supercapacitors. Background technique [0002] In recent years, alternative energy storage and conversion systems have become a global research hotspot. As a new type of energy storage device, supercapacitor has high energy density, high safety and low cost, and has become one of the best. It can be widely used in electric vehicles, fuel cells, portable electronic devices and so on. [0003] As far as the research and development of supercapacitors are concerned, the development of electrode materials with high specific capacity, high conductivity and stability has always been the focus of research. Molybdates such as cobalt molybdate and nickel molybdate have been used as electrode materials for lithium batteries. It can be expected tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/32
CPCY02E60/13H01G11/46H01G11/32
Inventor 邓松辉李柏烨孙玮骏铁津津孙明余林叶飞
Owner GUANGDONG UNIV OF TECH
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