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Preparation method and application of lithium ion battery negative electrode material

A technology of lithium-ion batteries and negative electrode materials, applied in the field of electrochemical power sources, can solve the problems of energy loss of carbon materials and poor performance of high-rate charge and discharge, and achieve the effect of easy industrial mass production, low production cost and good stability

Active Publication Date: 2016-01-20
GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Lithium-ion batteries usually mainly include four parts: positive electrode, negative electrode, electrolyte and diaphragm. The electrolyte is mainly adsorbed in the diaphragm and is the carrier for lithium ions to move between the positive and negative plates. Currently, the negative electrode materials used in lithium-ion batteries are mainly It is a carbon negative electrode material, such as artificial graphite, natural graphite, etc., but due to the disadvantages of large energy loss and poor high-rate charge and discharge performance of carbon materials, and the surface of carbon electrodes is easy to precipitate metal lithium, forming dendrites and causing short circuits, so , people's research goal is to find more reliable and efficient new lithium battery anode materials

Method used

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  • Preparation method and application of lithium ion battery negative electrode material

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Effect test

Embodiment 1

[0018] Weigh TiCl sequentially according to the mass ratio of 1:0.3:0.1 3 , glucose and potassium sulfate are added to 20 parts by mass ratio of distilled water, fully stirred and mixed evenly, then the mixed solution is added to the hydrothermal reactor, and reacted at a constant temperature at 120 ° C. The reaction time is about 10 hours, and the obtained material is washed and dried. Carbon-doped titanium dioxide is obtained by drying.

Embodiment 2

[0020] Weigh TiCl sequentially according to the mass ratio of 1:0.2:0.2 3 , glucose and potassium sulfate are added to 25 parts of distilled water in mass ratio, fully stirred and mixed evenly, then the mixed solution is added to the hydrothermal reactor, and reacted at a constant temperature at 160°C. The reaction time is about 6 hours, and the obtained material is washed and dried. Carbon-doped titanium dioxide is obtained by drying.

Embodiment 3

[0022] (1) Weigh 1 g of pyrrole monomer, prepare an aqueous solution of pyrrole monomer with a concentration of 0.1M, and sonicate for 30 minutes;

[0023] (2) After adding 1.5 g of the carbon-doped titanium dioxide prepared in Example 1 to the pyrrole solution obtained in step (1), after ultrasonication for 10 minutes, the reaction temperature is 120° C., and the reaction power is 120 KW;

[0024] (3) After the reaction, the solid was obtained by centrifugation, washed with deionized water for 3 times, placed in an oven at a temperature of 120°C, and dried for 2 hours to obtain a composite of carbon-doped titanium dioxide and polypyrrole .

[0025] The resulting composite of carbon-doped transition metal oxide and polypyrrole was used as the working electrode of the lithium-ion battery, lithium hexafluorophosphate was used as the electrolyte, and the charge-discharge performance of the lithium-ion battery was tested at a current density of 50mA / g. The charge and discharge ca...

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Abstract

The invention relates to a preparation method and an application of a lithium ion battery anode material. The compound of the lithium ion battery anode material is prepared by virtue of simple separation, washing and drying after pyrrole monomer reacts with carbon-doped metal oxide, and the obtained compound is large in specific capacity, high in cycling stability, small in toxicity, low in energy consumption and is a lithium ion anode material with good performance. The preparation method of the compound is simple to operate, pollution-free, free from side reaction, low in cost and is a feasible method, and the compound is convenient to use. The invention also relates to the preparation method of the carbon-doped metal oxide. The method has advantages of low production cost, large feasibility and easiness in industrialized mass production.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a preparation method and application of negative electrode materials for lithium ion batteries. Background technique [0002] Lithium-ion batteries have many advantages such as high voltage, small size and long life, etc. It has gradually entered the field of new energy vehicles and energy storage batteries, and has become the focus of research in the field of electrochemistry. [0003] Lithium-ion batteries usually mainly include four parts: positive electrode, negative electrode, electrolyte and diaphragm. The electrolyte is mainly adsorbed in the diaphragm and is the carrier for lithium ions to move between the positive and negative plates. Currently, the negative electrode materials used in lithium-ion batteries are mainly It is a carbon negative electrode material, such as artificial graphite, natural graphite, etc., but due to the disadvantages of la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M10/0525
CPCH01M4/139H01M4/362H01M4/483H01M10/0525Y02E60/10
Inventor 曾洪华曾宪武
Owner GUANGDONG TEAMGIANT NEW ENERGY TECH CORP