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A kind of graphene material prepared from biological calcium carbonate source and its application

A technology of biological calcium carbonate and graphene, which is applied in the direction of graphene, nano-carbon, electrical components, etc., can solve the problems of high preparation conditions and high preparation temperature, and achieve the effect of rich sources, good performance and wide sources

Active Publication Date: 2016-03-02
苏州宇豪纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned method for preparing graphene has a relatively high preparation temperature and requires relatively high preparation conditions.

Method used

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  • A kind of graphene material prepared from biological calcium carbonate source and its application
  • A kind of graphene material prepared from biological calcium carbonate source and its application
  • A kind of graphene material prepared from biological calcium carbonate source and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of method that is raw material preparation graphene material with biological calcium carbonate source, comprises the following steps:

[0030] (1) Heat the biological calcium carbonate source to 500°C to remove organic matter and obtain biological calcium carbonate;

[0031] (2) The obtained biological calcium carbonate and the metal reducing agent are placed in a mass ratio of 1:1, and the biological calcium carbonate and the metal reducing agent are respectively placed on both sides of the reaction vessel. After sealing, the reactor is placed in a high-temperature furnace Inside, under an inert atmosphere, heat to 700°C, react for 5 hours, and cool to room temperature;

[0032] (3) After reacting the obtained black product with 2M aqueous acid solution for 12 hours, filter and dry to obtain graphene.

[0033] attached figure 1 For the Raman spectrum of the obtained material, it is confirmed that the obtained material is a graphene material, and the crystallin...

Embodiment 2

[0036] A kind of method that is raw material preparation graphene material with biological calcium carbonate source, comprises the following steps:

[0037] (1) Heat the biological calcium carbonate source to 400°C to remove organic matter and obtain biological calcium carbonate;

[0038] (2) Mix the obtained biological calcium carbonate and the metal reducing agent in a mass ratio of 1:0.06, ball mill or grind evenly, place the mixture in a high-temperature furnace, and heat it to 600°C under an inert atmosphere, and react for 8 After hours, cool to room temperature;

[0039] (3) After reacting the obtained black product with 6M aqueous acid solution for 0.5 hour, filter and dry to obtain graphene.

[0040] Mix graphene material, polytetrafluoroethylene, and acetylene black in a weight ratio of 8:1:1 to form a slurry, roll it into thin sheets, cut into discs with a diameter of 12mm, and press them on nickel foam under a pressure of 10MPa on the collector. Select two pole p...

Embodiment 3

[0042] (1) Heat the biological calcium carbonate source to 550°C to remove organic matter and obtain biological calcium carbonate;

[0043] (2) Mix the obtained biological calcium carbonate and the metal reducing agent in a mass ratio of 1:2.4, ball mill or grind the mixture evenly, place the mixture in a high-temperature furnace, heat it to 750°C under an inert atmosphere, and react for 0.5 After hours, cool to room temperature;

[0044] (3) React the obtained black product with 3M aqueous acid solution for 6 hours, filter and dry to obtain graphene.

[0045] The obtained graphene material is made into a pole piece according to the steps in Example 1, assembled into a battery, and carried out a charge-discharge test. Under a charge-discharge current of 200mA / g, the charge-discharge cut-off voltage range is 10mV-3.0V, after 30 charges After discharge, its charge and discharge capacity can maintain more than 480mAh / g, with good performance.

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Abstract

The invention discloses a method for preparing a graphene material from a biological calcium carbonate source, which comprises the following steps: (1) heating a biological calcium carbonate source to 400-550 DEG C to remove organic substances, thereby obtaining biological calcium carbonate; (2) adding the obtained biological calcium carbonate and a metallic reducing agent in a mass ratio of 1:(0.01-2.4) into a high-temperature furnace in different modes, heating to 600-750 DEG C to react for 0.5-8 hours in an inert atmosphere, and cooling to room temperature; and (3) reacting the obtained black product with a 0.5-6M acid water solution for 0.5-12 hours, filtering and drying to obtain the graphene. The method for preparing the graphene material from the biological calcium carbonate source has the advantages of lower preparation cost, wider and more abundant sources, and lower requirements for preparation conditions and preparation equipment.

Description

technical field [0001] The invention relates to a preparation of graphene material and its application, in particular to a preparation of graphene material and its application using a biological calcium carbonate source as a raw material. Background technique [0002] Graphene is a two-dimensional honeycomb planar structure composed of sp2 hybridized carbon atoms. This special two-dimensional structure makes graphene exhibit many excellent physical, mechanical and chemical properties. In addition to single-layer graphene, graphene materials also include bilayer, few-layer, and multilayer graphene, which have a very wide range of applications in the fields of electronics, information, and energy. In energy storage applications, since the specific surface area of ​​the single-layer graphene material is 2630m2 / g, it has greater advantages than other energy storage electrode materials: Lithium ions can be stored on both sides of the single-sheet graphene to form LiC 3 structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04H01M4/133H01G11/32C01B32/184
CPCY02E60/10Y02E60/13
Inventor 包志豪刘珩李晓冬姚莉曾朝阳郭益民张卫平王冬
Owner 苏州宇豪纳米材料有限公司
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