Preparation method of graphene material and graphene material
A technology of graphene and graphite, which is applied in the field of new material preparation, can solve the problems that affect the large-scale development and application of graphene, increase the internal defects of graphene, and easily destroy the crystal structure, so as to improve the magnification, cycle performance, and high-quality structure , the effect of less impurity content
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[0044] Example 1:
[0045] The present invention provides a method for preparing graphene material, including the following steps:
[0046] S1: placing graphene oxide containing metallic impurities and / or non-metallic impurities in a carrier, and putting the carrier in a high-temperature vacuum furnace. In this step, the carrier is made of a graphite bowl, because the melting point of graphite is as high as 3652°C, which is much higher than the melting and boiling point of common metallic and non-metallic impurities, and during the processing, the graphene will not be introduced due to the carrier material Impurities of other elements. But not limited to this, the carrier material can also be other carrier materials with a higher melting point, such as tungsten foil, tantalum carbide carrier, or hafnium carbide carrier. In this step, the graphene oxide is placed in the carrier in a flat manner. The advantage of using flattening is that the flattening makes the heating area of t...
Example Embodiment
[0051] Example 2:
[0052] The present invention provides a method for preparing graphene material, including the following steps:
[0053] S1: placing graphene oxide containing metallic impurities and / or non-metallic impurities in a carrier, and putting the carrier in a high-temperature vacuum furnace. In this step, the carrier is a graphite bowl, and the graphene oxide is placed in the graphite bowl in a flat manner. In this step, the high-temperature vacuum furnace is a purification furnace. The preparation method of graphene oxide is the same as that in Example 1.
[0054] S2: Evacuate the high-temperature vacuum furnace to a negative pressure of 93 Pa. Specifically, the vacuum system of the purification furnace was opened, and the vacuum was pumped to a negative pressure of 93 Pa.
[0055] S3: Set the temperature of the high-temperature vacuum furnace to 2200°C, and heat for 180 minutes.
[0056] After the above three steps are completed, the graphene material is prepared, and ...
Example Embodiment
[0057] Example 3:
[0058] The present invention provides a method for preparing graphene material, including the following steps:
[0059] S1: placing graphene oxide containing metallic impurities and / or non-metallic impurities in a carrier, and putting the carrier in a high-temperature vacuum furnace. In this step, the carrier is a graphite bowl, and the graphene oxide is placed in the graphite bowl in a flat manner. In this step, the high-temperature vacuum furnace is a purification furnace. The preparation method of graphene oxide is the same as that in Example 1.
[0060] S2: Evacuate the high-temperature vacuum furnace to a negative pressure of 93 Pa. Specifically, the vacuum system of the purification furnace was opened, and the vacuum was pumped to a negative pressure of 93 Pa.
[0061] S3: Set the temperature of the high-temperature vacuum furnace to 2200°C and heat for 300 minutes.
[0062] After the above three steps are completed, the graphene material is prepared. After...
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