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Few-layer graphite material and preparation method thereof, electrode material and battery

A graphite material and electrode material technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problem of low battery discharge capacity

Inactive Publication Date: 2020-09-22
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a few-layer graphite material and its preparation method, electrode material and battery, in order to solve the problem of low discharge capacity of batteries using graphite materials as electrode materials

Method used

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  • Few-layer graphite material and preparation method thereof, electrode material and battery
  • Few-layer graphite material and preparation method thereof, electrode material and battery

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Embodiment 1

[0025] On the one hand, the embodiments of the present invention provide a method for preparing a few-layer graphite material, comprising: exfoliating graphite-like materials by means of high-energy collisions to obtain a few-layer graphite material. Graphite material can be natural graphite and / or artificial graphite, and natural graphite is the graphite that naturally forms in nature, specifically can be one or both in crystalline graphite (flaky graphite), aphanitic graphite (soily graphite); Artificial graphite is all graphite materials obtained through organic carbonization and high temperature treatment of graphitization.

[0026] Based on this, through the preparation method of the few-layer graphite material provided by the embodiment of the present invention, the graphite material is peeled off by means of high kinetic energy collision with high instantaneous energy and large impact force on the graphite material, so that the number of graphite layers is reduced , to ...

Embodiment 2

[0055] Another aspect of the embodiments of the present invention provides a few-layer graphite material, including the few-layer graphite material prepared by the preparation method of the few-layer graphite material described in the above scheme.

[0056] The few-layer graphite material prepared by the preparation method of the above-mentioned few-layer graphite material not only still has a good degree of graphitization, but also reduces the embedded ion voltage and increases the active sites of ions due to the reduction of the number of graphite layers. point.

Embodiment 3

[0058] Still another aspect of the embodiments of the present invention provides an electrode material, including the few-layer graphite material described in the above solution.

[0059] Using the above-mentioned few-layer graphite material as an electrode material, because the few-layer graphite material reduces the number of graphite layers and increases the specific surface area, the embedded ion voltage is reduced, and the active sites of ions are increased, which is the metal ion used as an intercalation substance. It provides more positions and reduces the difficulty for ions to enter the graphite layer, which can effectively improve the insertion and extraction of ions in the electrode material, improve the transmission process of electrons and ions in the battery, and finally increase the energy storage of the battery With the release ability, the discharge capacity of the battery is improved.

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Abstract

The invention discloses a few-layer graphite material, a preparation method of the few-layer graphite material, an electrode material and a battery, relates to the technical field of graphite materials, and aims to solve the problem of relatively low discharge capacity of a battery taking a graphite material as an electrode material. The preparation method of the few-layer graphite material comprises the step of stripping a graphite material in a high-energy collision mode to obtain the few-layer graphite material. The method is used for preparing the electrode material in the battery.

Description

technical field [0001] The invention relates to the technical field of graphite materials, in particular to a few-layer graphite material, a preparation method thereof, an electrode material and a battery. Background technique [0002] At present, fossil fuels are still the main energy sources for human production and life. With the increase of global energy consumption and unscientific usage, it not only has a serious impact on the environment, but also makes fossil fuels and other non-renewable energy sources face to be exhausted day by day, which urgently requires people to seek new energy sources. [0003] In recent years, new energy sources such as wind energy and solar energy have attracted people's attention because they are renewable, low-carbon and environmentally friendly. Among them, energy storage devices represented by chemical power sources have been developed rapidly, and will also become the key to solving future energy problems. For example, secondary batt...

Claims

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Application Information

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IPC IPC(8): C01B32/225H01M4/587H01M10/0525H01M10/054
CPCC01B32/225H01M4/587H01M10/0525H01M10/054Y02E60/10
Inventor 刘东海王俊明孟垂舟
Owner ENN SCI & TECH DEV
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