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Amorphous carbon material, preparation method thereof, negative electrode material and lithium ion battery

A technology of amorphous carbon and biomass materials, applied in the field of lithium ion batteries, amorphous carbon materials and preparation methods thereof, and negative electrode materials, can solve problems such as inability to meet, and achieve excellent structure, small specific surface area, and good mechanical properties. Effect

Inactive Publication Date: 2019-11-19
桑德新能源技术开发有限公司
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  • Application Information

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Problems solved by technology

[0003] At present, the commercial anode material is mainly graphite. On the one hand, its theoretical capacity is only 372mAh / g, which can no longer meet people's needs; on the other hand, the energy crisis and environmental problems are becoming more and more prominent. It is imminent to replace graphite anode materials with environmentally friendly materials with excellent electrochemical properties

Method used

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  • Amorphous carbon material, preparation method thereof, negative electrode material and lithium ion battery
  • Amorphous carbon material, preparation method thereof, negative electrode material and lithium ion battery
  • Amorphous carbon material, preparation method thereof, negative electrode material and lithium ion battery

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preparation example Construction

[0029] In order to solve the technical problems existing in the prior art, the embodiment of the present invention provides a preparation method of an amorphous carbon material, such as figure 1 As shown, the following steps may be included:

[0030] Step (1), mixing the biomass material with conductive carbon black to obtain a mixture;

[0031] Step (2), heat-treating the mixture;

[0032] Step (3), carbonizing the heat-treated mixture in an inert atmosphere, and grinding the carbonized product to obtain an amorphous carbon material; wherein, the carbonization temperature is higher than the heat treatment temperature.

[0033] Such as figure 2 As shown, it is the X-ray diffraction pattern of the amorphous carbon material of the present invention. From figure 2 It can be seen from the steamed bread peaks formed in the figure that the carbon material prepared by the preparation method provided in the embodiment of the present invention is an amorphous carbon material.

...

Embodiment 1

[0051] This embodiment provides a method for preparing an amorphous carbon material, which is prepared according to the following steps:

[0052] Step (1), potato flour and conductive carbon black are mixed evenly according to the mass ratio of 100:1, obtain compound;

[0053] Step (2), heat up the mixture to 230°C at a heating rate of 8°C / min, and keep the temperature for 5 hours;

[0054] Step (3), transfer the mixture to a tube furnace with a nitrogen protective atmosphere, raise the temperature to 750°C at a heating rate of 2°C / min, and keep it warm for 1.5 hours; naturally cool the carbonized product to room temperature, and grind it to obtain Shaped carbon materials.

Embodiment 2

[0056] This embodiment provides a preparation method of an amorphous carbon material, which differs from the preparation method of Example 1 in that in step (1), the mass ratio of potato flour to conductive carbon black is 200:1.

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Abstract

The invention discloses an amorphous carbon material, a preparation method thereof, a negative electrode material and a lithium ion battery. The preparation method includes the following steps: mixinga biomass material with conductive carbon black to obtain a mixture; heat-treating the mixture; and carbonizing the heat-treated mixture in an inert atmosphere, and grinding the carbonized product toobtain the amorphous carbon material. The preparation method provided by the embodiment of the present invention allows the spherical amorphous carbon material to be prepared, so the specific surfacearea of the amorphous carbon material is reduced, the mechanical properties and electrochemical properties of the amorphous carbon material are improved, and the energy crisis and environmental issues are effectively alleviated; and the preparation method of the amorphous carbon material has the advantages of simplicity, low device requirements and low preparation cost, so the amorphous carbonmaterial can be easily industrially produced and applied.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to an amorphous carbon material, a preparation method thereof, a negative electrode material, and a lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in electronic equipment, electric vehicles, energy storage power stations, aerospace and other fields due to their advantages such as high energy density, long cycle life, high working voltage, wide working temperature range and good safety. As one of the key factors to increase the energy density of lithium-ion batteries, anode materials have attracted extensive attention from researchers. [0003] At present, the commercial anode material is mainly graphite. On the one hand, its theoretical capacity is only 372mAh / g, which can no longer meet people's needs; on the other hand, the energy crisis and environmental problems are becoming more and more prominent. It is imminent to replace g...

Claims

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Application Information

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IPC IPC(8): C01B32/05H01M10/0525H01M4/62
CPCC01B32/05C01P2002/72C01P2004/03C01P2006/40H01M4/625H01M10/0525Y02E60/10
Inventor 杨琳苗力孝
Owner 桑德新能源技术开发有限公司
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