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A kind of hydrated tungsten trioxide/tungsten self-supporting electrode and preparation method thereof

A self-supporting electrode, tungsten trioxide technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, electrolytic coatings, etc. The process is simple and the effect is not easy to separate

Active Publication Date: 2021-04-02
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its relatively complex process, time-consuming and energy-consuming factors, hydrothermal preparation is not easy for industrial production.

Method used

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  • A kind of hydrated tungsten trioxide/tungsten self-supporting electrode and preparation method thereof
  • A kind of hydrated tungsten trioxide/tungsten self-supporting electrode and preparation method thereof
  • A kind of hydrated tungsten trioxide/tungsten self-supporting electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Metal tungsten sheet (Alfa Aisha Chemical Co., Ltd., purity 99.999%, the same below) (10mm×20mm, thickness 0.08mm), ultrasonically cleaned in acetone, isopropanol, ethanol and deionized water for 20 minutes in turn, and then used . Prepare 50 mL of hydrochloric acid solution with a mass concentration of 6%; accurately weigh 0.04 g of sodium lauryl sulfate (Aladdin Chemical Co., Ltd., powder, the same below) and add it to the above solution. Use metal tungsten sheet as anode, metal titanium sheet (Aladdin Chemical Co., Ltd., purity 99.99%, the same below) (20mm×20mm, thickness 0.2mm) as cathode, put in the prepared sodium dodecyl sulfate-hydrochloric acid electrolysis In the solution, keep the distance between the electrodes at 2cm, control the temperature of the electrolyte at 50°C, and oxidize at a constant voltage of 20v for 2h; after the reaction, wash the metal tungsten sheet with deionized water and dry it to obtain hydrated tungsten trioxide Nanosheet / tungsten se...

Embodiment 2

[0046] Metal tungsten sheets (10mm×20mm, thickness 0.08mm) were ultrasonically cleaned in acetone, isopropanol, ethanol and deionized water for 20 minutes in turn, and then used. Prepare 50 mL of hydrochloric acid solution with a mass concentration of 6%; accurately weigh 0.08 g of sodium lauryl sulfate and add it to the above solution. The metal tungsten sheet is used as the anode, and the metal titanium sheet (20mm×20mm, thickness 0.2mm) is used as the cathode, put into the prepared sodium dodecyl sulfate-hydrochloric acid electrolyte, keep the electrode distance at 2cm, and control the temperature of the electrolyte to 50°C, constant pressure oxidation at 20v for 2 hours; after the reaction, the metal tungsten sheet is rinsed with deionized water and dried to obtain a hydrated tungsten trioxide nanosheet / tungsten self-supporting electrode.

[0047] The XRD of the prepared material is as Figure 4 As shown, it can be seen from the phase matching that the prepared nanosheets...

Embodiment 3

[0049]The metal tungsten sheet (10mm×20mm, thickness 0.08mm) was ultrasonically cleaned in acetone, isopropanol, ethanol and deionized water for 20 minutes in turn, and then used. Prepare 50 mL of hydrochloric acid solution with a mass concentration of 6%; accurately weigh 0.12 g of sodium lauryl sulfate and add it to the above solution. The metal tungsten sheet is used as the anode, and the metal titanium sheet (20mm×20mm, thickness 0.2mm) is used as the cathode, put into the prepared sodium dodecyl sulfate-hydrochloric acid electrolyte, keep the electrode distance at 2cm, and control the temperature of the electrolyte to 50°C, constant pressure oxidation at 20v for 2 hours; after the reaction, the metal tungsten sheet is rinsed with deionized water and dried to obtain a hydrated tungsten trioxide nanosheet / tungsten self-supporting electrode.

[0050] The XRD of the prepared material is as Figure 7 As shown, it can be seen from the phase matching that the prepared nanosheet...

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Abstract

The invention discloses a hydrated trioxide tungsten / tungsten self-supporting electrode and a preparation method thereof; the hydrated trioxide tungsten / tungsten self-supporting electrode is preparedby the following steps of taking a metal tungsten sheet as an anode, taking a metal titanium sheet as a cathode, and carrying out an anode oxidization reaction in a sodium dodecyl sulfate-hydrochloricacid mixed electrolyte to prepare the hydrated trioxide tungsten / tungsten self-supporting electrode. The hydrated trioxide tungsten nanosheets prepared by the method are uniform in morphology, the structure is complete, and the nanosheets are vertically grown on a tungsten substrate and are firmly combined with the metal tungsten substrate and are not separated easily; in addition, the method disclosed by the invention is simple in process and high in preparation repeatability, low in equipment requirement, low in cost and easy to obtain, and the involved chemical products are low in cost andeasily available, so that that the electrode has a great prospect in industrial application.

Description

[0001] (1) Technical field [0002] The invention relates to a hydrated tungsten trioxide / tungsten self-supporting electrode and a preparation method thereof. [0003] (2) Background technology [0004] As an n-type semiconductor, tungsten trioxide has a relatively narrow band gap (2.5-2.8 eV), excellent electron transport speed, good chemical stability and other advantages. Devices and other fields have broad application prospects. Among them, hydrated tungsten trioxide can not only reduce the internal resistance of electron transmission in the material, but also increase the rate of proton exchange, which has potential applications in supercapacitors. [0005] At present, there are few literatures on the preparation of hydrated tungsten trioxide, mainly focusing on the preparation by hydrothermal method. For example, CN201610945842.3 reports a preparation method of tungsten trioxide dihydrate powder, which obtains tungsten trioxide dihydrate nanosheet powder through multipl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/22H01G11/24H01G11/30H01G11/46H01G11/86C25D11/26
CPCC25D11/26H01G11/22H01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 高静佟明兴李玉儒吴世照周俊熹陈晓丹李国华
Owner ZHEJIANG UNIV OF TECH
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