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Lithium ion battery anode material with high specific capacity and preparation method of lithium ion battery anode material

A lithium-ion battery and negative electrode material technology, applied in the direction of battery electrodes, carbon preparation/purification, secondary batteries, etc., can solve problems such as unsatisfactory requirements, and achieve the effects of facilitating immersion, increasing specific capacity, and ensuring stacking density

Inactive Publication Date: 2019-05-28
安徽益佳通电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commercial negative electrode materials are mainly graphite negative electrode materials, among which graphitized mesocarbon microspheres have close packing, which can increase the energy density of energy lithium-ion batteries. In addition, its smooth surface reduces the occurrence of side reactions and improves the first time. Charge and discharge efficiency, but the theoretical gram capacity of graphite as a negative electrode material is 372mAh, which can no longer meet people's requirements for high energy density lithium-ion batteries

Method used

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  • Lithium ion battery anode material with high specific capacity and preparation method of lithium ion battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 30g of hydroxide and 30g of sodium hydroxide, put them in a beaker, add 10mL of deionized water to stir and dissolve. Weigh 10 g of graphitized mesocarbon microspheres and add them to the alkali solution obtained above, and mix evenly. After the beaker containing the above mixture was baked in an oven at 60 °C for 24 h, the mixture was placed in a stainless steel tube furnace. Introduce argon gas as a protective gas, the gas flow rate is 50mL / min, the temperature is raised from room temperature to 700°C at a rate of 2°C / min, kept for 120min, and then naturally cooled to room temperature to obtain a heat-treated product. After washing 3 times with 5% dilute hydrochloric acid by mass percentage, clean it with a large amount of deionized water, and dry it. Get the product.

[0024] Lamellar spherical graphitized mesocarbon microspheres such as figure 1 shown. It can be seen from the figure that the mesophase carbon microspheres still maintain a spherical structur...

Embodiment 2

[0028] Weigh 10g of hydroxide and 20g of sodium hydroxide, put them in a beaker, add 10mL of deionized water to stir and dissolve. Weigh 10 g of graphitized mesocarbon microspheres and add them to the lye, and mix well. After the beaker containing the above mixture was baked in an oven at 60 °C for 24 h, the mixture was placed in a stainless steel tube furnace. Argon was introduced as a protective gas, the gas flow rate was 50mL / min, the temperature was raised from room temperature to 600°C at a rate of 5°C / min, kept for 180min, and then naturally cooled to room temperature to obtain a heat-treated product. After washing with 5% dilute hydrochloric acid for 3 times, it was cleaned with a large amount of deionized water and dried. Get the product.

Embodiment 3

[0030] Weigh 10g of hydroxide and 20g of sodium hydroxide, put them in a beaker, add 10mL of deionized water to stir and dissolve. Weigh 10 g of graphitized mesocarbon microspheres and add them to the lye, and mix well. After the beaker containing the above mixture was baked in an oven at 60 °C for 24 h, the mixture was placed in a stainless steel tube furnace. Introduce argon gas as a protective gas, the gas flow rate is 50mL / min, the temperature is raised from room temperature to 1000°C at a rate of 5°C / min, kept for 180min, and then naturally cooled to room temperature to obtain the heat-treated product. After washing with 10% dilute hydrochloric acid for 3 times, it was cleaned with a large amount of deionized water and dried. Get the product.

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Abstract

The invention discloses a lithium ion battery anode material with the high specific capacity and a preparation method of the lithium ion battery anode material. The lithium ion battery anode materialcomprises graphitized mesophase carbon microspheres, and the surfaces of the graphitized mesophase carbon microspheres are propped open to form a closely connected laminated structure. The preparationmethod includes the steps that the graphitized mesophase carbon microspheres are added to alkali liquor to be evenly mixed and react, and then the lithium ion battery anode material with the high specific capacity is prepared by drying after baking, heat treatment under the protective atmosphere, cooling, pickling and washing successively. According to the lithium ion battery anode material withthe high specific capacity and the preparation method of the lithium ion battery anode material, the prepared laminated spherical lithium ion battery anode material has a low voltage platform and thehigh specific capacity.

Description

technical field [0001] The invention belongs to the technical field of battery negative electrode materials and preparation methods thereof, and in particular relates to a high specific capacity lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are used more and more widely, not only in various electronic products, but also in electric vehicles, signal base stations, energy storage and so on. The impact on human life is becoming more and more important. In recent years, with the development of science and technology, the rapid development of electric vehicles and energy storage. Lithium-ion batteries using graphite as the negative electrode material are increasingly unable to meet people's needs for high-energy-density lithium-ion batteries. The energy density of lithium-ion batteries is mainly determined by the positive and negative electrode materials of lithium-ion batteries. It is very ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/205H01M4/587H01M10/0525
CPCY02E60/10
Inventor 崔李三王龙超周德清张翔耿斌马振向明祥朱正中李庆余
Owner 安徽益佳通电池有限公司
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