Light-enhanced supercapacitor electrode material and all-solid-state supercapacitor and preparation thereof

A technology for supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes and hybrid capacitor electrolytes, can solve the problems that complex systems are difficult to put into large-scale production and use, and light-enhanced supercapacitors cannot work for a long time, so as to improve charge and discharge efficiency and solve Unable to work for a long time, the effect of increasing density

Active Publication Date: 2022-02-25
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above technical requirements, the present invention proposes an electrode material for a light-enhanced supercapacitor, an all-solid supercapacitor and a preparation method thereof, which effectively solves the problem that the light-enhanced supercapacitor cannot work for a long time due to temperature constraints, and the complex system of solid-liquid combination is difficult. Issues such as putting into large-scale production and use

Method used

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  • Light-enhanced supercapacitor electrode material and all-solid-state supercapacitor and preparation thereof

Examples

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Embodiment 1

[0050] This embodiment discloses the preparation of an electrode material for a light-enhanced supercapacitor, and the preparation process is as follows:

[0051] Dissolve 0.365g vanadium pentoxide powder in deionized water, and after ultrasonication, form a vanadium pentoxide aqueous solution with a concentration of 0.067mol / L, add 30% hydrogen peroxide to the vanadium pentoxide aqueous solution and continue ultrasonication to form a mixed Liquid, wherein the volume ratio of vanadium pentoxide aqueous solution to hydrogen peroxide is 1:6; then add 0.061g graphene oxide to form a precursor solution. The precursor solution was poured into a hydrothermal kettle, heated at 205°C for 48 hours, and annealed at 350°C for 2 hours in an air environment in a tube furnace to obtain vanadium pentoxide / reduced graphene oxide powder.

[0052] The vanadium pentoxide / reduced graphene oxide powder was dispersed in isopropanol to obtain a composite material dispersion, wherein the vanadium pen...

Embodiment 2

[0055] This embodiment provides a light-enhanced symmetrical all-solid-state supercapacitor, whose structure is as follows: Figure 4 As shown, including the gel electrolyte layer 1 in the middle, the electrode sheets symmetrically arranged on both sides of the gel electrolyte layer 1, the electrode sheets are the light-enhanced supercapacitor electrode materials prepared in Example 1, and the transparent conductive substrate 2 specifications of the electrode sheets 20mm*30mm*1.6mm, the area of ​​the growing composite material film layer 3 is 20mm*20mm, and a 10mm blank conductive layer is reserved on the substrate for pasting the tabs 4 to lead out the soft case 5, the soft case 5 is made of aluminum The material of the plastic package is uniformly sealed around the soft package shell 5 with a plastic sealing machine to prevent the electrode sheet from being damaged in the air for a long time and affecting its normal use. An opening with an area of ​​8mm*8mm is reserved on on...

Embodiment 3

[0060] The difference between this embodiment and embodiment 1 is that the mass ratio of vanadium pentoxide powder to graphene oxide is 12:1.

[0061] The morphology of the vanadium pentoxide / reduced graphene oxide composite film in the light-enhanced supercapacitor electrode material prepared in this example is almost the same as that of the film prepared in Example 1.

[0062] According to the method of Example 2, the light-enhanced supercapacitor electrode material prepared in this example was used as an electrode sheet to prepare a light-enhanced symmetrical all-solid-state supercapacitor. according to Figure 9 It can be seen from the capacitance performance gain curve shown that the capacitance gain ratio of this embodiment is slightly lower than that of Embodiment 2 under the same lighting conditions.

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Abstract

The invention discloses a light-enhanced supercapacitor electrode material, an all-solid-state supercapacitor and preparation of the light-enhanced supercapacitor electrode material. The all-solid-state supercapacitor comprises two symmetrically-arranged electrode plates and a gel electrolyte layer located between the two electrode plates, and the electrode plates are the light-enhanced supercapacitor electrode material. The light-enhanced supercapacitor electrode material comprises a composite material film and a transparent conductive substrate, wherein the composite material film is formed by loading a reduced graphene oxide nanosheet on a vanadium pentoxide nanowire, and the composite material film is attached to the transparent conductive substrate. Under the irradiation of sunlight, the energy storage characteristics (specific capacity and charging and discharging speed) of the light-enhanced all-solid-state supercapacitor are effectively improved. The all-solid-state super capacitor is constructed by adopting the gel electrolyte, and the problems that a light enhancement super capacitor cannot work for a long time due to temperature limitation, a solid-liquid combined complex system is difficult to put into large-scale production and use, and the performance of the capacitor is reduced due to electrolyte loss are solved.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a light-enhanced supercapacitor electrode material and an all-solid supercapacitor and its preparation. Background technique [0002] With the development of science and technology, energy depletion caused by excessive consumption of resources is a serious challenge that people are currently facing, so the use of renewable energy is extremely important. Sunlight is an important renewable energy source, but due to the intermittent nature of sunlight, solar cells typically need to be connected to rechargeable batteries, electrochemical capacitors, or other energy storage devices for energy storage. [0003] Among many energy storage components, supercapacitors have the dual functions of both batteries and capacitors, and have attracted widespread attention because of their characteristics such as instantaneous high-current charge and discharge, environmental pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56H01G11/36H01G11/46H01G11/26
CPCH01G11/56H01G11/36H01G11/46H01G11/26Y02E60/13
Inventor 李渭龙王笛景亚伟何密任兆玉
Owner NORTHWEST UNIV(CN)
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