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Preparation method of negative electrode material for carbon-coated antimony-doped stannic oxide ion batteries

A tin dioxide, ion battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low theoretical capacity, poor conductivity, poor cycle stability, etc., to achieve simple material source, increased specific capacity, price low cost effect

Inactive Publication Date: 2018-08-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Lithium-ion battery anode materials are mainly divided into two categories, one is carbon materials, including activated carbon, graphene, carbon nanotubes, carbon fibers, etc., but they are limited by their own low theoretical capacity; the other is transition metal oxides, such as four Ferric oxide, tin dioxide, etc., although they have high theoretical specific capacity, they have poor electrical conductivity and poor cycle stability

Method used

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  • Preparation method of negative electrode material for carbon-coated antimony-doped stannic oxide ion batteries
  • Preparation method of negative electrode material for carbon-coated antimony-doped stannic oxide ion batteries
  • Preparation method of negative electrode material for carbon-coated antimony-doped stannic oxide ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of carbon-coated antimony-doped tin dioxide ion battery anode material with antimony-tin molar ratio of 6.25%

[0050] Step 1, preparation of antimony-doped tin dioxide;

[0051] tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O) and antimony trichloride (SbCl 3 ) is dissolved in deionized water at a ratio of 6.25% in molar ratio of antimony to tin to obtain solution A; then an appropriate amount of ammonium bicarbonate (NH 4 HCO 3 ) was added to solution A, and after stirring for 10 minutes, solution B was obtained; the resulting solution B was transferred to a 50mL autoclave lined with polytetrafluoroethylene, and kept at a temperature of 180°C for 12 hours, and the precipitate was taken , that is, antimony-doped tin dioxide;

[0052] Dosage: Add 0.71g of tin tetrachloride pentahydrate, 0.073g of antimony trichloride, and 0.32g of ammonium bicarbonate to 20mL of deionized water;

[0053] Step 2, preparation of carbon-coated antimony-doped tin dioxide; ...

Embodiment 2

[0072] Preparation of carbon-coated antimony-doped tin dioxide ion battery anode material with antimony-tin molar ratio of 6%

[0073] Step 1, preparation of antimony-doped tin dioxide;

[0074] tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O) and antimony trichloride (SbCl 3 ) is dissolved in deionized water at a ratio of 6% to antimony-tin ratio to obtain solution A; then ammonium bicarbonate (NH 4 HCO 3 ) was added to solution A, and after stirring for 10 minutes, solution B was obtained; solution B was transferred to a 50mL autoclave lined with polytetrafluoroethylene, and after 15 hours of insulation at a temperature of 160°C, the precipitate was taken. That is, antimony-doped tin dioxide;

[0075] Dosage: Add 0.781g of tin tetrachloride pentahydrate, 0.077g of antimony trichloride, and 0.352g of ammonium bicarbonate to 20mL of deionized water;

[0076] Step 2, preparation of carbon-coated antimony-doped tin dioxide;

[0077] The antimony-doped tin dioxide prepared ...

Embodiment 3

[0092] Preparation of carbon-coated antimony-doped tin dioxide ion battery anode material with antimony-tin molar ratio of 7%

[0093] Step 1, preparation of antimony-doped tin dioxide;

[0094] tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O) and antimony trichloride (SbCl 3 ) is dissolved in deionized water at a ratio of 7% to antimony-tin ratio to obtain solution A; then ammonium bicarbonate (NH 4 HCO 3 ) was added to solution A, and after stirring for 10 minutes, solution B was obtained; the resulting solution B was transferred to a 50mL autoclave lined with polytetrafluoroethylene, and kept at a temperature of 180°C for 8 hours, and the precipitate was taken , that is, antimony-doped tin dioxide;

[0095] Dosage: Add 0.71g of tin tetrachloride pentahydrate, 0.082g of antimony trichloride, and 0.30g of ammonium bicarbonate to 20mL of deionized water;

[0096] Step 2, preparation of carbon-coated antimony-doped tin dioxide;

[0097] The antimony-doped tin dioxide prepar...

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Abstract

The invention discloses a preparation method of a negative electrode material for carbon-coated antimony-doped stannic oxide ion batteries. The method comprises the following steps: firstly using antimony to dope stannic oxide through a hydrothermal reaction, then taking glucose as a carbon source, carrying out carbon-coated treatment on the carbon source through the hydrothermal reaction, and then carrying out high-temperature heat treatment to generate the high-performance negative electrode material for ion batteries. During doping at the molar ratio of antimony to tin is 6% to 7%, the generated negative electrode material for the ion batteries is of a uniform nano-particle structure, and also has extremely good electrochemical performance. When the material serves as a negative electrode material for the lithium ion batteries, after 400 circles of circulation at the current density of 0.5 C, the specific discharge capacity of the material still can be maintained to be 1500 to 1820mAh / g. The raw materials used for preparing the negative electrode material for carbon-coated antimony-doped stannic oxide ion batteries comprise glucose, stannic chloride, antimony chloride, ammoniumbicarbonate and the like, and are wide in sources and low in cost; and the electrode material is simple and controllable in preparation technology, mild in condition and simple in equipment.

Description

technical field [0001] The invention relates to the preparation of ion battery negative electrode materials, more particularly, refers to a preparation method of ion battery negative electrode materials coated with antimony and tin dioxide doped with carbon. Background technique [0002] Lithium-ion battery is a rechargeable battery based on the transmission of lithium ions between positive and negative electrodes. Lithium-ion batteries have high energy density, high voltage, good safety, no pollution, no memory effect, long cycle life, and fast charging Discharge, small self-discharge, wide operating temperature range and so on. Based on the above advantages, lithium-ion batteries have become the main energy devices of portable electronic products such as mobile phones, cameras, and notebook computers, and are also very likely to be used in future products such as power vehicles and portable wearable electronic devices. Therefore, the research on lithium-ion batteries and ...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/48H01M4/62
CPCH01M4/38H01M4/48H01M4/625Y02E60/10
Inventor 高秋明张强
Owner BEIHANG UNIV
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