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Regular hexagonal nano flaky tungsten disulfide electrode material and preparation method and application thereof

A nano-flaky, tungsten disulfide technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of improving and unfavorable electrochemical performance, achieve the effect of shortening the migration path and improving electrochemical performance

Inactive Publication Date: 2019-12-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently the researchers synthesized WS 2 The morphology is mostly irregular nanosheets, which is not conducive to the improvement of its electrochemical performance

Method used

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  • Regular hexagonal nano flaky tungsten disulfide electrode material and preparation method and application thereof
  • Regular hexagonal nano flaky tungsten disulfide electrode material and preparation method and application thereof
  • Regular hexagonal nano flaky tungsten disulfide electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Add tungsten hexachloride into 60mL ethylene glycol solution and magnetically stir until completely dissolved to form a yellow clear solution A. The stirring speed is 500r / min, and the stirring time is 15min. The control solution concentration is 0.01mol / L.

[0036] Step 2: add thioacetamide in solution A, control n(WCl 6 ):n(CH 3 CSNH 2 )=9:2, then add 6mL of oleic acid, control the volume ratio of ethylene glycol and oleic acid to 10:1, stir for 1.5h, and form a uniform mixed solution.

[0037] Step 3: Transfer the above solution to a 100mL polytetrafluoroethylene reactor for homogeneous reaction. The reaction temperature is 200°C and the reaction time is 48h. After the reaction is completed, it is naturally cooled to room temperature.

[0038] Step 4: Open the reaction kettle, take out the product, wash it with absolute ethanol and deionized water in turn, and centrifuge it. After repeated washing for 6 times, put it in a freeze dryer with a temperature of...

Embodiment 2

[0041] Step 1: Add tungsten hexachloride into 45mL ethylene glycol solution and magnetically stir until it is completely dissolved to form a yellow clear solution A. The stirring speed is 700r / min, and the stirring time is 15min. The control solution concentration is 0.05mol / L.

[0042] Step 2: add thioacetamide in solution A, control n(WCl 6) :n(CH 3 CSNH 2 )=7:3, then add 4.5mL oleic acid, control the volume ratio of ethylene glycol and oleic acid to 10:1, stir for 2h, and form a uniform mixed solution.

[0043] Step 3: Transfer the above solution to a 100mL polytetrafluoroethylene reactor for homogeneous reaction. The reaction temperature is 220° C., and the reaction time is 4 hours. After the reaction is completed, it is naturally cooled to room temperature.

[0044] Step 4: Open the reaction kettle, take out the product, wash it with absolute ethanol and deionized water in turn, and centrifuge it. After repeated washing for 5 times, put it in a freeze dryer with a temp...

Embodiment 3

[0047] Step 1: Add tungsten hexachloride into 60mL ethylene glycol solution and magnetically stir until it is completely dissolved to form a yellow clear solution A. The stirring speed is 700r / min, and the stirring time is 10min. The control solution concentration is 0.1mol / L.

[0048] Step 2: add thioacetamide in solution A, control n(WCl 6 ):n(CH 3 CSNH 2 )=10:1, then add 6mL oleic acid, control the volume ratio of ethylene glycol and oleic acid to be 10:1, stir for 1.5h, and form a uniform mixed solution.

[0049] Step 3: Transfer the above solution to a 100mL polytetrafluoroethylene reactor for homogeneous reaction. The reaction temperature is 200°C and the reaction time is 24h. After the reaction is completed, it is naturally cooled to room temperature.

[0050] Step 4: Open the reaction kettle, take out the product, wash it with absolute ethanol and deionized water in turn, and centrifuge it. After repeated washing for 6 times, put it in a freeze dryer at a temperature ...

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Abstract

The invention provides a regular hexagonal nano flaky tungsten disulfide electrode material and a preparation method and application thereof. The preparation method comprises the following steps: step1, adding tungsten hexachloride into AN ethylene glycol solution, and stirring until the tungsten hexachloride is completely dissolved to obtain a solution A; 2, adding thioacetamide and oleic acid into the solution A, and stirring to obtain a mixed solution B; step 3, carrying out solvothermal reaction on the mixed solution B, and cooling after the reaction is finished; step 4, washing and drying the solvothermal reaction product to obtain black powder; and step 5, calcining the black powder at 900-1200 DEG C for 2-6 hours under the protection of an argon atmosphere to obtain regular hexagonal nano flaky tungsten disulfide. The prepared regular hexagonal nano-sheet tungsten disulfide is used as a negative electrode material of a sodium ion battery, and the regular nano-sheet morphology can effectively shorten the ion migration path in the charging and discharging process, thereby improving the electrochemical performance.

Description

technical field [0001] The invention relates to the preparation of tungsten disulfide nanomaterials, in particular to a regular hexagonal nano-sheet tungsten disulfide electrode material and its preparation method and application. Background technique [0002] Two-dimensional layered nanomaterials mainly include graphene, two-dimensional transition metal chalcogen compounds, etc. The two-dimensional transition metal sulfides are mainly connected to each other through the van der Waals force, which is relatively weak, making the layers easy to peel off and forming a nanosheet structure. Two-dimensional transition metal sulfides exist in a layered structure in the form of X-M-X, and the transition metal atoms separate the chalcogen atoms to form a sandwich structure. With this special structure, transition metal sulfides are widely used in energy, environmental protection, mechanical friction, biomedicine and other fields. Transition metal tungsten sulfide nanomaterials are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B82Y30/00B82Y40/00
CPCC01G41/00B82Y30/00B82Y40/00C01P2004/22
Inventor 黄剑锋罗晓敏曹丽云李嘉胤李东明王泽坤甘雨王芳敏
Owner SHAANXI UNIV OF SCI & TECH