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A kind of preparation method of tungsten disulfide/super P sodium ion battery self-supporting negative electrode

A sodium-ion battery, tungsten disulfide technology, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of abnormal crystal growth of materials, difficult to control process conditions, difficult to control reaction ratio, etc., to improve the interface bonding , The effect of shortening the production process and promoting the insertion/extraction reaction

Active Publication Date: 2019-07-02
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, the existing preparation methods include vacuum impregnation method, gas phase vulcanization reaction method, chemical vapor deposition method, surfactant-assisted hydrothermal method, thermal decomposition method, precipitation reduction method, etc. These methods have complex process conditions, difficult to control, and equipment requirements. High, difficult to control the reaction ratio, abnormal material crystal growth, impure crystals, easy powder agglomeration, etc.

Method used

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  • A kind of preparation method of tungsten disulfide/super P sodium ion battery self-supporting negative electrode
  • A kind of preparation method of tungsten disulfide/super P sodium ion battery self-supporting negative electrode
  • A kind of preparation method of tungsten disulfide/super P sodium ion battery self-supporting negative electrode

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preparation example Construction

[0030] A preparation method of tungsten disulfide / Super P sodium ion battery self-supporting negative electrode, comprising the following steps:

[0031] 1) Take 1.5g of tungsten powder and grind it and dissolve it in 30mL of hydrogen peroxide solution with a mass fraction of 30%, keep the temperature at 25-40°C, and form a suspension A after 1h of reaction;

[0032] 2) Add analytically pure isopropanol to A, add 30-40ml of isopropanol to every 30ml of suspension A, stir with a magnetic stirrer at a speed of 500-700 rpm for 30-90min to form precursor B;

[0033] 3) Use a powder tablet press to press the ground Super P into an electrode support C with a thickness of 1mm, a length of 4mm, and a width of 2.5mm at a pressure of 20-30MPa;

[0034] 4) Put B into the hydrothermal induction kettle, then put C perpendicular to the magnetic field line of the induction coil in the hydrothermal induction heating equipment, and add 0.1-0.3g of C to every 60mL of B, seal the kettle, and pla...

Embodiment 1

[0039] (1) Take 1.5g of tungsten powder and grind it and dissolve it in 30mL of hydrogen peroxide solution with a mass fraction of 30%, keep the temperature at 35°C, and form suspension A after 1h of reaction;

[0040] (2) Add 35 mL of analytically pure isopropanol to A, and stir with a magnetic stirrer at a speed of 600 rpm for 60 min to form precursor B;

[0041] (3) Use a powder tablet press to compress the ground Super P into an electrode support body C with a thickness of 1 mm, a length of 4 mm, and a width of 2.5 mm with a pressure of 25 MPa;

[0042] (4) Put 60ml of precursor B into the hydrothermal induction kettle, put 0.2g C perpendicular to the magnetic field line of the induction coil in the hydrothermal induction heating equipment, seal the kettle, and place it in the hydrothermal induction heating equipment , heated up from room temperature to 180°C with an induction frequency of 500KHz, and kept it warm for 5h to obtain WO 2 / Super P composite material D;

[004...

Embodiment 2

[0047] (1) Take 1.5g of tungsten powder and grind it and dissolve it in 30mL of hydrogen peroxide solution with a mass fraction of 30%, keep the temperature at 40°C, and form a suspension A after 1h of reaction;

[0048] (2) Add 30 mL of analytically pure isopropanol to A, and stir with a magnetic stirrer at a speed of 500 rpm for 90 min to form precursor B;

[0049] (3) Use a powder tablet press to compress the ground Super P into an electrode support body C with a thickness of 1 mm, a length of 4 mm, and a width of 2.5 mm with a pressure of 20 MPa;

[0050] (4) Put 60ml of precursor B into the hydrothermal induction kettle, then put 0.3g C perpendicular to the magnetic field line of the induction coil in the hydrothermal induction heating equipment, seal the kettle, and place it in the hydrothermal induction heating equipment In the process, the temperature was raised from room temperature to 200°C with an induction frequency of 600KHz, and kept for 4h to obtain WO 2 / Super...

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Abstract

The invention discloses a preparation method for a tungsten disulfide / Super P sodium ion battery self-supported negative electrode. Super P is pressed into a sheet shape to obtain an electrode supporting body; then a WO<2> solution of a certain concentration is prepared by tungsten powder and a hydrogen peroxide solution; the obtained solution, and isopropanol and the electrode supporting body are put into a hydrothermal kettle to be heated by hydrothermal induction heating equipment, and thermal insulation is performed for a certain time, and the product is washed and dried to obtain a three-dimensional porous structured WO<2> / Super P composite material; and next, the composite material and a certain amount of thiourea are calcined in a tubular atmosphere furnace (argon) for a certain time to obtain the three-dimensional porous structured tungsten disulfide / Super P sodium ion battery self-supported negative electrode.

Description

technical field [0001] The invention belongs to the field of sodium ion self-supporting negative electrode preparation, and in particular relates to a preparation method of a tungsten disulfide / Super P sodium ion battery self-supporting negative electrode. Background technique [0002] Lithium-ion batteries have become the main energy storage devices in the field of consumer electronics due to their advantages such as high energy density, high voltage, low self-discharge and excellent cycle performance. However, the lack of lithium resources on the earth and the wide application of lithium-ion batteries make lithium resources more scarce and the price remains high, which is not suitable for large-scale energy storage applications. Sodium and lithium belong to the same group of elements, have similar physical and chemical properties with lithium, are abundant in reserves, and are cheap (the basic raw material trona of sodium is about 30 to 40 times cheaper than lithium carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1397H01M4/04H01M4/136H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/0416H01M4/0471H01M4/136H01M4/1397H01M10/054Y02E60/10
Inventor 黄剑锋李瑞梓焦冰玉李嘉胤何元元党欢李春光陈文卓
Owner SHAANXI UNIV OF SCI & TECH
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