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Preparation method of super capacitor based on single-wall carbon nanotube/tungsten oxide nanowire composite film electrodes

A technology of single-walled carbon nanotubes and tungsten oxide nanowires, which is applied in the field of preparation of supercapacitor film electrodes, can solve the problems of complex preparation process of composite electrode materials, unfavorable micro-nano structure for aluminum ion embedding, and poor bending performance of supercapacitors. Achieve the effects of overcoming poor cycle stability, low cost, and improving specific capacitance

Inactive Publication Date: 2017-02-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First, the preparation process of the composite electrode material is complicated; second, the composite material is single, and the micro-nano structure is not conducive to the intercalation of aluminum ions, which affects the capacitance performance; third, the assembled supercapacitor has poor bending performance and cannot meet the current emerging requirements. requirements for wearable devices, etc.

Method used

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  • Preparation method of super capacitor based on single-wall carbon nanotube/tungsten oxide nanowire composite film electrodes
  • Preparation method of super capacitor based on single-wall carbon nanotube/tungsten oxide nanowire composite film electrodes
  • Preparation method of super capacitor based on single-wall carbon nanotube/tungsten oxide nanowire composite film electrodes

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Embodiment 1

[0031] In an air environment with a humidity of 50%, put polyvinylpyrrolidone and tungsten hexachloride into absolute ethanol solution and stir respectively to obtain a precursor solution containing 7 μg / ml polyvinylpyrrolidone and 0.75 mg / ml tungsten hexachloride, The solution was placed in a hydrothermal kettle, kept at 180°C for 18 hours, cooled to room temperature naturally, centrifuged and washed, then added to deionized water to obtain 3 mg / ml W 18 o 49 nanowire dispersion. The suspension containing 15 mg of single-walled carbon nanotubes was mixed with 15 ml of the above W 18 o 49 The nanowire dispersion is mixed, suction filtered, washed and dried to obtain single-walled carbon nanotubes / W 18 o 49 Nanowire flexible composite thin film electrodes. The obtained composite film is used as the cathode, the single-walled carbon nanotube / polyaniline film is used as the anode, and 1mol / L aluminum chloride aqueous solution is used as the electrolyte, and an aluminum ion su...

Embodiment 2

[0033] In an air environment with a humidity of 20%, put polyvinylpyrrolidone and tungsten hexachloride into absolute ethanol solution and stir respectively to obtain a precursor solution containing 7 μg / ml polyvinylpyrrolidone and 0.2 mg / ml tungsten hexachloride, The solution was placed in a hydrothermal kettle, kept at 160°C for 18 hours, cooled to room temperature naturally, centrifuged and washed, then added to deionized water to obtain 3 mg / ml W 18 o 49nanowire dispersion. The suspension containing 15 mg of single-walled carbon nanotubes was mixed with 15 ml of the above W 18 o 49 The nanowire dispersion is mixed, suction filtered, washed and dried to obtain single-walled carbon nanotubes / W 18 o 49 Nanowire flexible composite thin film electrodes. The obtained composite film was used as the cathode, the single-walled carbon nanotube / polyaniline film was used as the anode, and the 1mol / L aluminum nitrate aqueous solution was used as the electrolyte, and an aluminum io...

Embodiment 3

[0035] In an air environment with a humidity of 20%, put polyvinylpyrrolidone and tungsten hexachloride into absolute ethanol solution and stir respectively to obtain a precursor solution containing 5 μg / ml polyvinylpyrrolidone and 1.2 mg / ml tungsten hexachloride, The solution was placed in a hydrothermal kettle, kept at 180°C for 18 hours, cooled to room temperature naturally, centrifuged and washed, then added to deionized water to obtain 5mg / ml W 18 o 49 nanowire dispersion. The suspension containing 10 mg of single-walled carbon nanotubes was mixed with 10 ml of the above W 18 o 49 The nanowire dispersion is mixed, suction filtered, washed and dried to obtain single-walled carbon nanotubes / W 18 o 49 Nanowire flexible composite thin film electrodes. The obtained composite film is used as the cathode, the single-walled carbon nanotube / polyaniline film is used as the anode, and the 0.5 mol / L aluminum nitrate aqueous solution is used as the electrolyte, and an aluminum io...

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Abstract

The invention relates to a preparation method of a super capacitor based on single-wall carbon nanotube / tungsten oxide nanowire composite film electrodes. The preparation method includes: preparing the anhydrous ethanol precursor solution of tungsten salt and polyvinyl pyrrolidone under air atmosphere, performing reaction at 160-200 DEG C for 10-20 hours, cooling, centrifuging, washing, and dispersing to obtain W18O49 nanowire dispersing liquid; mixing the nanowire dispersing liquid with a single-wall carbon nanotube, performing suction filtration, washing, and drying to obtain the single-wall carbon nanotube / tungsten oxide nanowire composite film electrodes; using the composite film electrode as the cathode, using the single-wall carbon nanotube / polyaniline film as the anode, using an aluminum salt solution as electrolyte, and assembling to obtain the super capacitor. The preparation method has the advantages that compositing of electric double layer electrode materials and pseudocapacitor electrode materials at the micro-nano level is achieved, the prepared super capacitor is excellent in aluminum ion capacitance performance and extremely good in mechanical flexibility, and the application range of the super capacitor is further expanded.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor film electrodes, in particular to a method for preparing supercapacitors based on single-wall carbon nanotube / tungsten oxide nanowire composite film electrodes. Background technique [0002] Supercapacitors are widely studied as the most promising electrochemical energy storage devices. According to different electrochemical energy storage principles, the electrode materials of supercapacitors are divided into electric double layer electrode materials and pseudocapacitive electrode materials. Generally speaking, the electric double layer electrode material has high conductivity, fast charge and discharge speed, and good electrochemical stability, but the capacitance is small. Pseudocapacitive electrode materials have good capacitive performance and high energy density, but have the disadvantages of low charge and discharge rate and poor stability. Therefore, compounding the above two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/24H01G11/30H01G11/36H01G11/46
CPCY02E60/13H01G11/84H01G11/24H01G11/30H01G11/36H01G11/46H01G11/86
Inventor 王宏志李克睿刘诗逸李耀刚张青红侯成义
Owner DONGHUA UNIV
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