Mixed metal sulfide electrode and preparation method thereof

A mixed metal and sulfide technology, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, battery electrodes, etc., can solve the problems of hindering the industrial application of platinum and high cost, and is conducive to commercial large-scale production, The effect of low cost and high device performance

Inactive Publication Date: 2017-11-03
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In energy conversion devices, such as dye-sensitized solar cells, photo-splitting water hydrogen production devices, photocatalytic degradation of dye devices or low-temperature fuel cells, noble metal platinum is widely used as a catalyst material in various catalytic electrodes, but its cost is high and in Corrosion in various electrolyte solutions hinders the industrial application of platinum in energy conversion devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Add 0.04mol·L -1 Iron acetylacetonate, 0.04mol L -1 Sodium molybdate, 0.15mol·L -1 Thiourea, 2mmol·L -1 Polyethylene glycol-block-polypropylene glycol-block-polyethylene glycol with an average molecular weight of 8400 and 10mol L -1 Ammonium hydroxide is dissolved in water to prepare a mixed metal precursor aqueous solution;

[0018] 2) Place the mixed metal sulfide precursor aqueous solution prepared in step 1) in the lining of the polytetrafluoroethylene reactor, curl the titanium foil and stick it to the inner wall of the reactor lining, seal it, perform high-pressure hydrothermal reaction, and react The temperature is 200°C, the reaction time is 12 hours, cooled to room temperature, washed with water and ethanol to obtain an iron sulfide@molybdenum sulfide electrode.

[0019] The iron sulfide@molybdenum sulfide electrode is composed of a central core layer and a peripheral shell layer, and forms a hierarchical array structure perpendicular to the titanium foi...

Embodiment 2

[0021] 1) Add 0.03mol·L -1 Cobalt chloride, 0.03mol·L -1 Sodium molybdate, 0.12mol·L -1 Thiourea, 2mmol·L -1 Polyethylene glycol-block-polypropylene glycol-block-polyethylene glycol with an average molecular weight of 8400 and 8mol L -1 Ammonium hydroxide is dissolved in water to prepare a mixed metal precursor aqueous solution;

[0022] 2) Place the mixed metal sulfide precursor aqueous solution prepared in step 1) in the lining of the polytetrafluoroethylene reactor, and place the conductive surface of the FTO conductive glass facing down and parallel to the substrate of the lining of the reactor in the reactor , closed, high-pressure hydrothermal reaction, the reaction temperature is 180 ° C, the reaction time is 15 hours, cooled to room temperature, washed with water, washed with ethanol to obtain cobalt sulfide@molybdenum sulfide electrode.

[0023] The cobalt sulfide@molybdenum sulfide electrode is composed of a central core layer and a peripheral shell layer, and fo...

Embodiment 3

[0025] 1) Add 0.03mol·L -1 Nickel chloride, 0.06mol·L -1 Ammonium molybdate, 0.20mol·L -1 Thiourea, 2mmol·L -1 Polyethylene glycol-block-polypropylene glycol-block-polyethylene glycol with an average molecular weight of 8400 and 10mol L -1 Ammonium hydroxide is dissolved in water to prepare a mixed metal precursor aqueous solution;

[0026] 2) Place the mixed metal sulfide precursor aqueous solution prepared in step 1) in the lining of the polytetrafluoroethylene reactor, curl the titanium foil and stick it to the inner wall of the reactor lining, seal it, perform high-pressure hydrothermal reaction, and react The temperature is 180°C, the reaction time is 15 hours, cooled to room temperature, washed with water and ethanol to obtain a nickel sulfide@molybdenum sulfide electrode.

[0027] The nickel sulfide@molybdenum sulfide electrode is composed of a central core layer and a peripheral shell layer, and forms a hierarchical array structure perpendicular to the titanium foi...

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Abstract

The invention discloses a mixed metal sulfide electrode and a preparation method thereof. The mixed metal sulfide electrode is composed of a central core layer and a peripheral shell layer, and is vertical to a conducting substrate to form a hierarchical array structure. The preparation method comprises the following steps: dissolving compounds containing iron, cobalt or nickel into a mixed water solution containing molybdenum and sulfur respectively, adopting a high-pressure hydrothermal method, and carrying out a one-step reaction on the conducting substrate material to obtain the mixed metal sulfide electrode. The hierarchical structure of the electrode is beneficial for improving the specific surface area of the electrode material and increasing the catalytic activity sites; the array structure is beneficial for improving the electron transfer efficiency of the electrode material and the diffusion of an electrolyte; and the adjustable electronic energy level is beneficial for effective injection of electrons from the electrode to the electrolyte. Through these advantages, the catalytic activity, stability and corresponding device performance of the mixed metal sulfide electrode are higher than those of a corresponding single metal sulfide electrode. The electrode prepared by the method can meet high-efficiency and low-cost energy conversion and the application requirement of storage devices.

Description

technical field [0001] The invention relates to an energy conversion and energy storage electrode, in particular to a mixed metal sulfide electrode and a preparation method thereof. Background technique [0002] In energy conversion devices, such as dye-sensitized solar cells, photo-splitting water hydrogen production devices, photocatalytic degradation of dye devices or low-temperature fuel cells, noble metal platinum is widely used as a catalyst material in various catalytic electrodes, but its cost is high and in Corrosion in various electrolyte solutions hinders the industrial application of platinum in energy conversion devices. In energy storage devices, such as supercapacitors or lithium-ion batteries, carbon-based materials or lithium salts with layered structures are usually used as electrode materials. The key to high-efficiency energy conversion and storage devices lies in the preparation of electrodes. It is of great significance to develop electrodes with high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/58H01G11/30H01G11/36H01G11/86
CPCH01G11/30H01G11/36H01G11/86H01M4/366H01M4/505H01M4/525H01M4/5815Y02E60/10
Inventor 肖尧明韩高义
Owner SHANXI UNIV
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