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CORRUGATED AND POROUS GRAPHENE FOR USE IN SUPERCAPACITORS
WO15075294
The supercapacitors have drawn great attention in the industry as energy storage devices because of their high performance, in terms of reversibility, life cycles and high energy and power densities. The proper selection of electrodes is decisive in this type of device, and the selected material must have high specific surface area, accurate pore size distributions, thermal stability and stable electrochemical behaviour. In this context, graphene, and especially the highly corrugated porous graphene is an exceptional candidate. Researchers from University of Valencia, IMDEA Nanoscience and Autonomous University of Madrid have developed a new method for synthesizing highly corrugated porous graphene with excellent supercapacitive properties. The method consists of calcination at moderate temperatures (less than 1000°C) of COF materials ("Covalent Organic Frameworks") with adsorbed metals. The effectiveness of the obtained graphene supercapacitive electrode, which exceeds the effectiveness of any related carbonaceous material, is caused by its high surface area and uniform pore size distribution.
Applications: Graphene has many applications in materials science, electronics and nanotechnology, and in this case, particularly highlights the use of the obtained graphene in the manufacture of supercapacitors. Supercapacitors are mainly used for energy storage: "energy smoothing" and momentary-load devices, KERS devices used in vehicles, replacing batteries for specific cases, smaller applications like home solar energy systems, etc. Advantages: The developed method for grapheme production has the following advantages: - Low cost: chemical process of a single step with a single precursor, at low temperature, and using available, non-polluting and economical materials. - Good properties of the obtained graphene: excellent textural and conductivity properties and stability and mechanical resistance from the point of view of their possible industrial processing for various applications. - Supercapacitor application: suitable properties for use in the supercapacitors electrodes.