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Preparation method of negative electrode material of high-specific-capacitance flexible super-capacitor

A supercapacitor and high specific capacitance technology, which is applied in the field of preparation of high specific capacitance flexible supercapacitor anode materials, can solve the problems of safety and cycle stability restricting the application, and achieve accelerated charge transfer rate, high yield and simple operation Effect

Inactive Publication Date: 2017-06-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safety and cycle stability of Li-ion batteries severely restrict their application in wearable devices

Method used

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  • Preparation method of negative electrode material of high-specific-capacitance flexible super-capacitor
  • Preparation method of negative electrode material of high-specific-capacitance flexible super-capacitor
  • Preparation method of negative electrode material of high-specific-capacitance flexible super-capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 5g tungstic acid and 1.42g molybdenum oxide in 60ml H 2 o 2 middle. Add an equal amount of deionized water and ethylene glycol to dilute the solution to 200ml to obtain the desired hydrothermal reaction precursor solution. Mix 20ml of the above precursor solution with the same amount of deionized water, pour it into the liner of a polytetrafluoroethylene hydrothermal kettle, and keep it warm at 120°C for 5 hours. Subsequently, the desired molybdenum-doped tungsten oxide nanoparticle powder is obtained through centrifugation, washing and drying.

[0031] Mix 100 mg of the above-mentioned molybdenum-doped tungsten oxide powder with 10 mg of CNTs and 40 mg of sodium dodecylbenzenesulfonate in 30 ml of deionized water, and disperse by ultrasonic for 90 minutes to obtain a uniform dispersion. Pour the above dispersion into a sand core funnel for suction filtration. After pumping until there is no free water, add deionized water to wash 3 times, and clean the sodi...

Embodiment 2

[0034] Dissolve 5g tungstic acid and 0.71g molybdenum oxide in 60ml H 2 o 2 middle. Add an equal amount of deionized water and ethylene glycol to dilute the solution to 200ml to obtain the desired hydrothermal reaction precursor solution. Mix 20ml of the above precursor solution with the same amount of deionized water, pour it into the liner of a polytetrafluoroethylene hydrothermal kettle, and keep it warm at 120°C for 5 hours. Subsequently, the desired molybdenum-doped tungsten oxide nanoparticle powder is obtained through centrifugation, washing and drying.

[0035] Mix 100 mg of the above-mentioned molybdenum-doped tungsten oxide powder with 10 mg of CNTs and 40 mg of sodium dodecylbenzenesulfonate in 30 ml of deionized water, and disperse by ultrasonic for 90 minutes to obtain a uniform dispersion. Pour the above dispersion into a sand core funnel for suction filtration. After pumping until there is no free water, add deionized water to wash 3 times, and clean the sodi...

Embodiment 3

[0038] Dissolve 5g tungstic acid and 2.84g molybdenum oxide in 60ml H 2 o2 middle. Add an equal amount of deionized water and ethylene glycol to dilute the solution to 200ml to obtain the desired hydrothermal reaction precursor solution. Mix 20ml of the above precursor solution with the same amount of deionized water, pour it into the liner of a polytetrafluoroethylene hydrothermal kettle, and keep it warm at 120°C for 5 hours. Subsequently, the desired molybdenum-doped tungsten oxide nanoparticle powder is obtained through centrifugation, washing and drying.

[0039] Mix 100 mg of the above-mentioned molybdenum-doped tungsten oxide powder with 10 mg of CNTs and 40 mg of sodium dodecylbenzenesulfonate in 30 ml of deionized water, and disperse by ultrasonic for 90 minutes to obtain a uniform dispersion. Pour the above dispersion into a sand core funnel for suction filtration. After pumping until there is no free water, add deionized water to wash 3 times, and clean the sodium...

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Abstract

The invention relates to a preparation method of a negative electrode material of a high-specific-capacitance flexible super-capacitor. The preparation method comprises the following steps: (1) preparing molybdenum-doped tungsten oxide nanoparticles through a hydrothermal method; dispersing the molybdenum-doped tungsten oxide nanoparticles and carbon nanotubes CNTs into water; carrying out ultrasonic treatment to obtain a uniform dispersed solution; (2) performing suction filtration on the dispersed solution, and washing and drying to obtain the negative electrode material of the high-specific-capacitance flexible super-capacitor. The preparation method provided by the invention is simple, short in time and low in cost; the prepared electrode material has relatively high flexibility and electrochemical activities; under relatively high current density, the area specific capacitance can reach 1.1F.cm<-2>; the electrode material has great application prospect in the field of the super-capacitors.

Description

technical field [0001] The invention belongs to the field of capacitor electrode materials, in particular to a preparation method of a high specific capacitance flexible supercapacitor negative electrode material. Background technique [0002] Since the advent of Google Glass in 2012, wearable devices have entered and affected our lives. Many companies and research institutions have successively developed wearable commercial products or conceptual prototypes such as sports bracelets / watches, portable real-time blood pressure / blood sugar / heart rate monitors, and flexible displays. How to power wearable devices has become a major problem limiting its further development. At present, the power source of wearable devices is mainly lithium-ion batteries. However, the safety and cycle stability of Li-ion batteries severely restrict their application in wearable devices. Therefore, it is urgent to develop a safe, efficient, and flexible energy storage device to meet the needs of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/30H01G11/36H01G11/86
CPCY02E60/13H01G11/46H01G11/30H01G11/36H01G11/86
Inventor 王宏志李建民李海增李耀刚张青红侯成义
Owner DONGHUA UNIV
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