Method for preparing graphene-base superconductive capacitor electrode
A capacitor electrode and graphene-based technology, which is applied in the manufacture of hybrid/electric double layer capacitors, can solve the problems of difficult shape control, short cycle life, and small capacitance, and achieve easy shape control, long cycle life, and high capacitance. big effect
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[0015] A method for preparing a graphene-based superconducting container electrode, the preparation steps are:
[0016] (a) dispersing graphene in a liquid medium to prepare a graphene dispersion, which contains a blowing agent;
[0017] (b) depositing the dispersion onto a substrate to form a liquid film;
[0018] (c) removing said liquid medium to form a layer of dry graphene material;
[0019] (d) heat-treating the dry layer at a temperature of 1200° C. to volatilize non-carbon volatile gas molecules, and to cause the foaming agent to foam, thereby producing a solid graphene foam layer; the physical properties of the graphene foam layer The density is 1.2g / cm 3 , the specific surface area is 1500m 2 / g;
[0020] (e) impregnating the graphene foam layer with an electrolyte to form a pre-impregnated graphene foam layer, and then compressing to form the graphene-based superconducting container electrode.
[0021] The foaming agent is one or more of sodium lauryl sulfate, ...
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