Molybdenum sulfide flexible electrode material and preparation method and application thereof

A flexible electrode and molybdenum sulfide technology, applied in nanotechnology for materials and surface science, battery electrodes, hybrid capacitor electrodes, etc., can solve the problems of broken cotton cloth, difficult to maintain shape, high synthesis temperature, etc., to reduce the generation temperature , Excellent electrochemical performance, simple operation

Active Publication Date: 2019-01-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis temperature of molybdenum sulfide is relatively high. Under the high temperature and high pressure hydrothermal environment, it is easy to cause the cotton cloth to break and it is difficult to maintain the shape.

Method used

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  • Molybdenum sulfide flexible electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Splash a layer of gold on the surface of the cotton cloth, the mass ratio of gold to cotton cloth is 1:5;

[0046] (2) the material that step (1) is obtained is mixed with ammonium molybdate, ammonium fluoride and urea, wherein the mass ratio of cotton cloth and ammonium molybdate is 1:1, and the mol ratio of ammonium molybdate, ammonium fluoride and urea is 1:2:4, transfer the mixture to a closed reaction kettle, heat it in an oven at 150°C for 24 hours, separate the solid and liquid after the reaction is completed, and wash to obtain the precursor;

[0047] (3) Mix the precursor obtained in step (2) with sodium sulfide, wherein the molar ratio of sodium sulfide to ammonium molybdate is 1:4, transfer it to a closed reaction kettle again, and heat it in an oven at 100°C for 10 hours to react After completion, solid-liquid separation and cleaning;

[0048] (4) The material obtained in step (3) was heat-treated at 750° C. for 3 hours to obtain a molybdenum sulfide fl...

Embodiment 2

[0052] (1) Splash a layer of silver on the surface of the dust-free cloth, the mass ratio of silver to dust-free cloth is 1:8;

[0053] (2) The material obtained in step (1) is mixed with ammonium thiomolybdate, ammonium fluoride and urea, wherein the mass ratio of ammonium thiomolybdate and dust-free cloth is 4:1, ammonium thiomolybdate, fluorine The molar ratio of ammonium chloride and urea is 1:3:5, the mixture is transferred to a closed reaction kettle, and heated in an oven at 200°C for 5 hours. After the reaction is completed, the solid-liquid separation is performed, and the precursor is obtained by cleaning;

[0054] (3) The precursor that step (2) is obtained is mixed with sodium thiosulfate, wherein the mol ratio of sodium thiosulfate to ammonium thiomolybdate is 1:2, and is transferred to the airtight reaction kettle again, in the oven at 120 Water heating at ℃ for 8 hours, solid-liquid separation after the reaction is completed, and cleaning;

[0055] (4) The mate...

Embodiment 3

[0059] (1) Splash a layer of copper on the surface of the cotton cloth, and the mass ratio of copper to dust-free cloth is 1:10;

[0060] (2) The material obtained in step (1) is mixed with sodium molybdate, ammonium fluoride and urea, wherein the mass ratio of sodium molybdate and dust-free cloth is 3:1, the molar ratio of sodium molybdate, ammonium fluoride and urea The ratio is 1:10:10, transfer the mixture to a closed reaction kettle, and heat it in an oven at 120°C for 20 hours. After the reaction is completed, the solid and liquid are separated and cleaned to obtain the precursor;

[0061] (3) Mix the precursor obtained in step (2) with sodium sulfide, wherein the molar ratio of sodium sulfide to sodium molybdate is 1:3, transfer it to a closed reaction kettle again, and heat it in an oven at 90°C for 12h, and react After completion, solid-liquid separation and cleaning;

[0062] (4) heat-treating the material obtained in step (3) at 1000° C. for 1 h to obtain a molybde...

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Abstract

The invention relates to a molybdenum sulfide flexible electrode material and a preparation method and application thereof. The method comprises the steps of spraying a single metal on a surface of acotton carbon source, mixing with a molybdenum source, ammonium fluoride and urea to carry out a hydrothermal reaction, after the reaction is completed, conducting solid-liquid separation to obtain aprecursor material, mixing the precursor material with a sulfur source, conducting a second hydrothermal reaction, after the completion of the reaction, performing the solid-liquid separation, and after heat treatment, obtaining the molybdenum sulfide flexible electrode material. The method directly uses a waste cotton material or a material mostly made of cottons as a carbon source and a template, and is economical and environmentally friendly; a metal is used as a catalyst, a two-step vulcanization method is adopted, the formation temperature of molybdenum sulfide is lowered, and the flexibility and integrity of the cotton material are maintained; the prepared molybdenum sulfide flexible electrode material has excellent electrochemical performance when used as a negative electrode material for lithium ion batteries, the reversible specific capacity of charge and discharge for the first time can reach 800-1400 mAh/g, and the molybdenum sulfide flexible electrode material has broad application prospects.

Description

technical field [0001] The invention relates to the field of preparation of nanometer materials, in particular to a molybdenum sulfide flexible electrode material and a preparation method and application thereof. Background technique [0002] The rise of flexible and wearable electronic devices has promoted the rapid development of flexible energy storage technologies. As the core part of flexible energy storage devices, the preparation and assembly of flexible electrodes directly determine the performance level of flexible energy storage devices. Cotton material has good flexibility, lightness, low price, and environmental friendliness. It can be carbonized after high-temperature heat treatment and has good electrical conductivity. It can be used as the substrate of the material. [0003] Molybdenum sulfide (MoS 2 ) has a graphene-like two-dimensional layered structure and is an ideal negative electrode material for lithium-ion batteries. However, during the cycle, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/30H01G11/36H01G11/86H01M4/362H01M4/5815H01M4/62H01M4/625Y02E60/10
Inventor 谭强强夏青
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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