Process for preparing graphite according to electrochemical method
A graphene and electrochemical technology, applied in the field of electrochemical preparation of graphene, to achieve the effects of thorough intercalation, reduced distance and fast intercalation speed
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Embodiment 1
[0044] A kind of technique of preparing graphene electrochemically, comprises the steps:
[0045](1) The Lewis acid containing transition metal ions and the protonic acid containing the same anion were prepared into a solution with a mass fraction of 5-30%, and then the above two solutions were mixed according to a mass ratio of 1:1 to prepare an electrolyte. Wherein, the Lewis acid includes one of ferric chloride, aluminum chloride, zinc chloride, manganese chloride and nickel chloride or a mixture of them in any proportion, and the protonic acid is hydrochloric acid.
[0046] (2) Use graphite plate as the negative electrode and graphite paper as the positive electrode, control the distance between the positive electrode and the negative electrode to be 3cm, then completely immerse the graphite paper in the electrolyte solution and perform intercalation at a voltage of 1-3V. There are a small amount of air bubbles on the edge of the graphite paper. After 20-30 minutes of inte...
Embodiment 2
[0050] A kind of technique of preparing graphene electrochemically, comprises the steps:
[0051] (1) Prepare ferric chloride solution with a mass fraction of 5% and hydrochloric acid with a mass fraction of 10%, and then mix the above two solutions according to a mass ratio of 1:1 to prepare an electrolyte.
[0052] (2) Use graphite plate as the negative electrode, graphite paper as the positive electrode, control the distance between the positive electrode and the negative electrode to be 3cm, then completely immerse the graphite paper in the electrolyte and intercalate at a voltage of 1V. When intercalating the graphite paper A small amount of air bubbles were generated at the edge. After 20 minutes of intercalation, the intercalated graphite paper with obvious volume expansion was obtained. The thickness of the intercalated graphite paper was 10 times that of the graphite paper before intercalation, and the surface of the intercalated graphite paper was rough but not No de...
Embodiment 3
[0056] A kind of technique of preparing graphene electrochemically, comprises the steps:
[0057] (1) Prepare aluminum chloride solution with a mass fraction of 30% and hydrochloric acid with a mass fraction of 15%, and then mix the above two solutions according to a mass ratio of 1:1 to prepare an electrolyte.
[0058] (2) Use graphite plate as the negative electrode, graphite paper as the positive electrode, control the distance between the positive electrode and the negative electrode to be 3cm, then completely immerse the graphite paper in the electrolyte and intercalate at a voltage of 3V. When intercalating the graphite paper A small amount of air bubbles were generated at the edge. After 30 minutes of intercalation, the intercalated graphite paper whose volume expanded significantly was obtained. The thickness of the intercalated graphite paper was 100 times that of the graphite paper before intercalation, and the surface of the intercalated graphite paper was rough but ...
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