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Preparation method of supercapacitor electrode material vanadium trioxide/carbon

A technology of vanadium trioxide and supercapacitor, applied in the field of electrochemical energy storage, can solve problems such as high working voltage, and achieve the effect of simple preparation process and low price

Pending Publication Date: 2020-12-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to prepare V with higher working voltage and high specific capacitance 2 o 3 Materials remain challenging

Method used

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  • Preparation method of supercapacitor electrode material vanadium trioxide/carbon
  • Preparation method of supercapacitor electrode material vanadium trioxide/carbon
  • Preparation method of supercapacitor electrode material vanadium trioxide/carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 400 mg glucose, add a mixed solution of 40 mL deionized water and 10 mL isopropanol, stir until dissolved, and stir at 600 rpm.

[0023] (2) Weigh 40 mg of vanadyl acetylacetonate into the glucose solution obtained in step (1) and stir until dissolved at a stirring rate of 600 rpm.

[0024] (3) Transfer the solution obtained in step (2) to a 100 mL reactor, and place it in a constant temperature drying oven at 170 °C for 24 hours.

[0025] (4) Washed with alcohol, centrifuged three times, dried under vacuum for 12 h, and finally heat-treated in air atmosphere to obtain V 2 o 3 / C hollow nanosphere material. The centrifugal speed is 5000 rpm, the drying temperature is 60 °C, the drying time is 12 h, the heat treatment temperature is 500 °C, the heat treatment time is 1.5 h, and the heating rate is 2 °C / min.

[0026] (5) With 1 M Na 2 SO 4 As the electrolyte, the V obtained in step (4) 2 o 3 / C hollow nanosphere electrodes as electrodes and cellulose acet...

Embodiment 2

[0028] (1) Weigh 500 mg of glucose, add a mixed solution of 40 mL of deionized water and 10 mL of isopropanol, stir until dissolved, and the stirring speed is 600 rpm.

[0029] (2) Weigh 50 mg of vanadyl acetylacetonate into the glucose solution obtained in step (1) and stir until dissolved at a stirring rate of 600 rpm.

[0030] (3) Transfer the solution obtained in step (2) to a 100 mL reactor, and place it in a constant temperature drying oven at 160 °C for 20 hours.

[0031] (4) Washed with alcohol, centrifuged three times, dried under vacuum for 12 hours, and finally heat-treated in air atmosphere to obtain V 2 o 3 / C hollow nanosphere material. The centrifugal speed is 5000 rpm, the drying temperature is 60 °C, the drying time is 12 h, the heat treatment temperature is 500 °C, the heat treatment time is 1.5 h, and the heating rate is 2 °C / min.

[0032] (5) With 1 M Na 2 SO 4 As the electrolyte, the V obtained in step (4) 2 o 3 / C hollow nanosphere electrodes as el...

Embodiment 3

[0034] (1) Weigh 600 mg of glucose, add a mixed solution of 40 mL of deionized water and 10 mL of isopropanol, stir until dissolved, and the stirring speed is 600 rpm.

[0035] (2) Weigh 60 mg of vanadyl acetylacetonate into the glucose solution obtained in step (1) and stir until dissolved at a stirring rate of 600 rpm.

[0036] (3) Transfer the solution obtained in step (2) to a 100 mL reactor, and place it in a constant temperature drying oven at 180 °C for 24 hours.

[0037] (4) Washed with alcohol, centrifuged three times, dried under vacuum for 12 h, and finally heat-treated in air atmosphere to obtain V 2 o 3 / C hollow nanosphere material. The centrifugal speed is 5000 rpm, the drying temperature is 60 °C, the drying time is 12 h, the heat treatment temperature is 500 °C, the heat treatment time is 1.5 h, and the heating rate is 2 °C / min.

[0038] (5) With 1 M Na 2 SO 4 As the electrolyte, the V obtained in step (4) 2 o 3 / C hollow nanosphere electrodes as electr...

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Abstract

A preparation method of vanadium trioxide / carbon as a supercapacitor electrode material belongs to the field of electrochemical energy storage, and comprises the following steps: taking vanadyl acetylacetonate and glucose as raw materials, preparing a V2O3 / C composite material through a hydrothermal method and subsequent annealing, taking the V2O3 / C composite material as an electrode of a supercapacitor, and taking a Na2SO4 aqueous solution as an electrolyte to assemble a symmetrical water-based supercapacitor. The raw materials are cheap, and the preparation process is simple; the V2O3 / C hollow nanosphere has a wide voltage window of -1.1-1.3 V (vs.Ag / AgCl), and the specific capacitance of the V2O3 / C hollow nanosphere can reach 708.6 F g-1; the V2O3 / C hollow nanosphere is used as an electrode, the Na2SO4 aqueous solution is used as an electrolyte, the working voltage of the prepared symmetric supercapacitor can reach 2.4 V, and the symmetric supercapacitor has ultrahigh energy densityof 96.8 W h kg-1 and excellent cycling stability.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and relates to a preparation method of a supercapacitor electrode material. Background technique [0002] As a new type of energy storage device, supercapacitors have attracted much attention due to their much higher power density compared to batteries, fast charge and discharge capabilities, extremely high life, wide temperature range, and environmental friendliness. However, its energy density is much lower than that of batteries, which greatly limits its application in various fields. Therefore, how to improve the energy density by designing high-efficiency electrode materials has become an urgent problem to be solved at this stage. [0003] The electrodes of a supercapacitor are divided into positive and negative electrodes. At present, most of the research work is focused on how to prepare pseudocapacitive cathode materials with high specific capacitance, but when applied to s...

Claims

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Application Information

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IPC IPC(8): C01G31/02C01B32/15B82Y40/00B82Y30/00H01G11/46H01G11/36H01G11/24H01G11/86
CPCB82Y30/00B82Y40/00C01G31/02C01P2004/34C01P2004/80C01B32/15H01G11/24H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 袁凯陈义旺张凯洋胡婷
Owner NANCHANG UNIV
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