Battery graphite anode material prepared by using nano graphite carbon powder and method of preparing same

A technology of nano-graphite and graphite anode, which is applied in battery electrodes, nano-technology for materials and surface science, nano-technology, etc. Low cost, conducive to mass production, and the effect of increasing gram capacity

Active Publication Date: 2016-10-12
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous development of electronic technology, electronic products have more urgent performance requirements for lithium-ion secondary battery energy storage and fast charging. The energy storage and fast charging performance of lithium-ion battery capacity mainly depends on the development and improvement of graphite negative materials. Therefore, the particle size requirements of graphite negative materials are getting smaller and smaller. Since spherical natural graphite with small particle sizes is still not scaled up, only artificial graphite can be used to prepare graphite negative electrode materials with small particle sizes, and artificial graphite and natural graphite are also used. It is used in combination, but because the problem of particle size cannot be solved well, the processing performance of the material is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of method of the present invention utilizes nano-graphite carbon powder to prepare above-mentioned battery graphite negative electrode material, comprises roasting and graphitization, and obtains required battery graphite negative electrode material after graphitization, specifically implements according to the following steps:

[0016] The first step: roasting;

[0017] The roasting is to place the nano-graphite carbon powder in a roasting furnace for roasting and carbonization. When the temperature is 130°C, the heating rate is 1.2°C / h; when the temperature is 350°C, the heating rate is 1.0°C / h; when the temperature is 550°C , the heating rate is 1.3°C / h; when the temperature is 820°C, the heating rate is 2.3°C / h, and after keeping for 24 hours, it is naturally cooled to room temperature and released;

[0018] The second step: graphitization;

[0019] The graphitization is to place the carbonized nano-graphite carbon powder in a graphitization furnace for 450 ...

Embodiment 2

[0024] A kind of method of the present invention utilizes nano-graphite carbon powder to prepare above-mentioned graphite negative electrode material of battery, comprises roasting and graphitization, obtains required graphite negative electrode material of battery after graphitization, specifically implements according to the following steps:

[0025] The first step: roasting;

[0026] The roasting is to place the nano-graphite carbon powder in a roasting furnace for roasting and carbonization. When the temperature is 350°C, the heating rate is 1.6°C / h; when the temperature is 550°C, the heating rate is 1.3°C / h; when the temperature is 850°C , the heating rate is 1.6°C / h; when the temperature is 1200°C, the heating rate is 3°C / h, and keep it for 24 hours, then cool down to room temperature naturally and then come out of the furnace;

[0027] The second step: graphitization;

[0028] The graphitization is to place the carbonized nano-graphite carbon powder in a graphitization...

Embodiment 3

[0033] A kind of method of the present invention utilizes nano-graphite carbon powder to prepare above-mentioned graphite negative electrode material of battery, comprises roasting and graphitization, obtains required graphite negative electrode material of battery after graphitization, specifically implements according to the following steps:

[0034] The first step: roasting;

[0035] The roasting is to place the nano-graphite carbon powder in a roasting furnace for roasting and carbonization. When the temperature is 240°C, the heating rate is 1.4°C / h; when the temperature is 450°C, the heating rate is 1.2°C / h; when the temperature is 700°C , the heating rate is 1.5°C / h; when the temperature is 1010°C, the heating rate is 2.7°C / h, keep it for 24 hours, cool down to room temperature naturally, and then release it;

[0036] The second step: graphitization;

[0037] The graphitization is carried out by putting the carbonized nano-graphite carbon powder in a graphitization furn...

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Abstract

The invention overcomes the defects of the prior art and provides a battery graphite anode material prepared by using nano graphite carbon powder and a method of preparing the same. Obtained is the graphite anode material featuring high quality, high reliability, high energy density, long life, high cathode utilization, high initial discharge efficiency and the like; to solve the above technical problem, a following technical scheme is used: a battery graphite anode material prepared by using nano graphite carbon powder and a method of preparing the same, wherein the graphite anode material is 30-70 nm in particle size D, > / =2.33 g / cm<2> in true density, < / =0.01% in ash content, > / =1.13 g / cm<2> in tap density, < / =1.7 g / cm<2> in specific surface area, 325-355 mAh / g in initial discharge capacity and > / =90% in initial discharge efficiency, and the desired battery graphite anode material is obtained through calcining and graphitizing; the invention is widely applicable to the field of battery graphite anode materials.

Description

technical field [0001] The invention discloses a graphite negative electrode material for a battery prepared by using nano-graphite carbon powder and a method thereof, belonging to the technical field of graphite negative electrode materials for batteries. Background technique [0002] In the early 1990s, lithium-ion batteries developed rapidly as one of the most advanced battery industries. Due to their high voltage, long life, large specific energy, and no memory effect, they have become the mainstay of mobile phones, cameras, video cameras, notebook computers, electric batteries, etc. A must-have accessory for batteries such as cars. In particular, the negative electrode materials of electric vehicle batteries require high-performance lithium-ion secondary batteries, and the quality of lithium-ion secondary battery negative electrode materials has high standards. [0003] With the continuous development of electronic technology, electronic products have more urgent perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M10/0525C01B31/04B82Y30/00
CPCB82Y30/00H01M4/587H01M10/0525Y02E60/10
Inventor 闵洁
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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