Vanadium oxide electrode material with nanorod structure, and preparation method and application thereof

A nano-rod-shaped, electrode material technology, applied in electrolytic inorganic material coating, hybrid capacitor electrode, hybrid/electric double layer capacitor manufacturing and other directions, can solve problems such as low energy density, achieve high area specific capacitance, increase specific surface area, prepare the effect of time reduction

Inactive Publication Date: 2021-08-06
LIAONING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, commercialized supercapacitors generally use activated carbon as the electrode material, and its main disadvantage is that the energy density is relatively low, while metal oxide materials store energy with pseudocapacitance, which has a much higher energy density than activated carbon, so it has become the current One of the hottest research topics

Method used

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  • Vanadium oxide electrode material with nanorod structure, and preparation method and application thereof
  • Vanadium oxide electrode material with nanorod structure, and preparation method and application thereof
  • Vanadium oxide electrode material with nanorod structure, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Cut the carbon cloth into a size of 1 cm × 2.5 cm, wash it with absolute ethanol, and then ultrasonicate it with deionized water for 5 minutes, and dry the cleaned carbon cloth in a vacuum drying oven at 60°C.

[0028] (2) In the three-electrode system, carbon cloth was used as the working electrode, carbon paper was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode. 3 The electrode is activated by the constant potential method in the solution, the potential is 1.8V, and the reaction time is 3h. After activation, rinse with deionized water to remove excess electrolyte, then place it in a three-electrode system, and use cyclic voltammetry to restore the electrode conductivity in a 3M KCl solution at a potential window of -1.2 to 1V, and scan the number of cycles for 100 laps. The treated samples were soaked in deionized water to remove excess electrolyte, and then dried in a vacuum oven at 60°C for 8 hours.

[0029...

Embodiment 2

[0031] 1) Cut the carbon cloth into a size of 1cm×2.5cm, wash it with absolute ethanol, and then ultrasonicate it with deionized water for 5 minutes, and dry the cleaned carbon cloth in a vacuum drying oven at 60°C.

[0032] 2) In the three-electrode system, carbon cloth was used as the working electrode, carbon paper was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode. 4 :(NH 4 ) 2 Electrodeposition was carried out by cyclic voltammetry in a mixed solution with Ac ratio of 1:2. Potential window is -1.5 ~ 1.5V, scan 100 circles. The obtained samples were soaked in deionized water to remove excess electrolyte, and then dried in a vacuum oven at 60 °C for 8 h.

[0033] figure 2 Respectively step (2) in embodiment 2 obtains the low multiple of product figure 2 (a) and high multiple figure 2 (b) SEM, cyclic voltammetry curve (c) and galvanostatic charge-discharge curve (d) of deposited vanadium oxide. Depend on figur...

Embodiment 3

[0035] 1) Cut the carbon cloth into a size of 1cm×2.5cm, wash it with absolute ethanol, and then ultrasonicate it with deionized water for 5 minutes, and dry the cleaned carbon cloth in a vacuum drying oven at 60°C.

[0036] (2) In the three-electrode system, carbon cloth was used as the working electrode, carbon paper was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode. 3 The electrode is activated by the constant potential method in the solution, the potential is 1.8V, and the reaction time is 3h. After activation, rinse with deionized water to remove excess electrolyte, then place it in a three-electrode system, and use cyclic voltammetry to restore the electrode conductivity in a 3M KCl solution at a potential window of -1.2 to 1V, and scan the number of cycles for 100 laps. The treated samples were soaked in deionized water to remove excess electrolyte, and then dried in a vacuum oven at 60°C for 8 hours.

[0037] 3) ...

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Abstract

The invention belongs to the technical field of new energy, and particularly relates to a vanadium oxide electrode material with a nanorod-shaped structure, and a preparation method and application thereof. The method comprises the following steps: firstly, performing activating treatment on carbon cloth in a three-electrode system by adopting a cyclic voltammetry method, then performing electrodeposition on vanadium oxide, and drying to obtain the vanadium oxide with the nanorod-shaped structure. The specific capacity of the carbon cloth is improved through a surface activation method, the number of oxygen-containing functional groups on the surface of the carbon cloth is increased, then a layer of vanadium oxide is plated on the surface of the carbon cloth through an electro-deposition method, and further the pseudocapacitance of the electrode material is improved. The method is easy to operate and short in preparation time, the vanadium oxide sediment which is of a nanorod structure and is evenly distributed is obtained on the treated carbon cloth, and the area specific capacitance is high.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a vanadium oxide electrode material with a nanorod structure and a preparation method and application thereof. Background technique [0002] Facing the increasingly severe energy crisis and environmental problems, it is becoming more and more important to develop efficient and reliable electrochemical energy storage systems. As a new type of energy storage device, supercapacitor has attracted extensive attention due to its high power density, fast charge and discharge speed, and long cycle life, and has a very broad application prospect. At present, commercialized supercapacitors generally use activated carbon as the electrode material, and its main disadvantage is that the energy density is relatively low, while metal oxide materials store energy with pseudocapacitance, which has a much higher energy density than activated carbon, so it has become the current One...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/34H01G11/86H01G11/24H01G11/26H01G11/46C25D9/04
CPCH01G11/34H01G11/86C25D9/04H01G11/46H01G11/26H01G11/24
Inventor 黄子航马天翼李慧杜斯佳
Owner LIAONING UNIVERSITY
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