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Microwave-assisted method of nickel molybdate graphene composite material used for capacitor

A composite material and graphite technology, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of long experiment period and long reaction time

Inactive Publication Date: 2015-07-01
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The traditional synthesis methods of electrode materials are mainly hydrothermal method and heating reflux method, but because of the long reaction time, it often takes a long experimental period to find the optimal reaction conditions through repeated trials

Method used

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  • Microwave-assisted method of nickel molybdate graphene composite material used for capacitor
  • Microwave-assisted method of nickel molybdate graphene composite material used for capacitor
  • Microwave-assisted method of nickel molybdate graphene composite material used for capacitor

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Embodiment

[0015] 50 mg GO, 1.1 g NiCl 2 ·6H 2 O, 0.8g (NH 4 ) 6 Mo 7 o 24 4H 2 O and 0.6g CO(NH 2 ) 2 Add 50 mL of mixed solvent (distilled water and ethylene glycol volume ratio of 1:1), and ultrasonically disperse for 30 minutes to form a uniform suspension. Transfer the above suspension to a 100mL round bottom flask, put it into a Discover microwave reactor, adjust the power to 200W, and reflux at 115°C for 30min. The obtained black precipitate was filtered and washed three times with distilled water and absolute ethanol, and dried in a vacuum oven at 60° C. for 12 hours. Finally, the dried product was heat-treated and calcined at 350° C. for 3 h under air condition. TEM, XRD and electrochemical tests were carried out on the prepared electrode materials, the results showed that NiMoO 4 -rGO positive electrode composite material, when the current density is 1A / g, the specific capacitance can reach 1270F / g.

[0016] As a control, pure NiMoO was prepared using the same condit...

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Abstract

The invention discloses a microwave-assisted method of a nickel molybdate graphene composite material used for a capacitor. An anode composite material of a NiMoO4-rGO capacitor is prepared by taking NiCl2.6H2O as a nickel source, (NH4)6Mo7O24.4H2O as a molybdenum source and graphite oxide as a carrier through microwave reflow assisting. The composite material effectively combines NiMoO4 with graphene, graphite oxide is reduced to be graphene through high-temperature reflow, urea serving as a nitrogen source provides rich nitrogen doping sites, and NiMoO4 is effectively adhered on the surface of graphene, so that specific capacitance of a compound is improved, electroconductivity of the compound is improved, and the microwave-assisted method has the advantages of simple operation, low cost, long circulating life, safety, zero pollution, high efficiency and the like. The microwave-assisted method is of great significance in solving the problem of energy resources and promoting application and development of super-capacitor materials.

Description

technical field [0001] The invention belongs to the field of supercapacitors, in particular to NiCl 2 ·6H 2 O is the nickel source, (NH 4 ) 6 Mo 7 o 24 4H 2 O as molybdenum source, graphene as carrier, synthesis of NiMoO 4 - rGO capacitor positive electrode composite. Background technique [0002] Supercapacitors are high-efficiency energy storage devices between ordinary batteries and traditional capacitors. They have the characteristics of high energy density, high power density, fast cycle charge and discharge, long life, and wide operating temperature range. Electrode materials for supercapacitors mainly include three categories: carbon materials, metal oxides, and conductive polymers. Carbon-based materials are the earliest electrode materials used in supercapacitors. They have the characteristics of stable performance, excellent conductivity, low price, and abundant resources. However, as capacitor materials, their specific capacitance is several orders of magn...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/38H01G11/86
CPCY02E60/13H01G11/24H01G11/28H01G11/30H01G11/46H01G11/86
Inventor 柴卉刘婷贾殿赠
Owner XINJIANG UNIVERSITY
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