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First Graphene UK Ltd have developed and scaled up a novel process for the production of transition metal dosed graphene platelets suitable for supercapacitors / electrocatalysts.
About
We have developed a new supercapacitor energy storage device based on high performing supercapacitor materials - these include graphene, dosed with manganese oxide to build unique, high surface area structures on a conductive graphene base. The technology has been proven at scale - we have produced material at industrially relevant scales and initial materials data is promising. First Graphene has an exclusive licence to the IP from the University of Manchester and Industrial know how, combined with access to world-class facilities at the Graphene Engineering Innovation Centre. Please refer to the attachments for further detail: https://firstgraphene.net/leading-the-charge-with-game-changing-supercapacitors/ https://firstgraphene.net/wp-content/uploads/2020/03/GAME-CHANGING-SUPERCAPS_20200318.pdf
Key Benefits
The approach presented herein offers a significant advance over the purely double-layer, pseudo-capacitive or hybrid approaches outlined above, as our method combines of two of the above approaches, specifically the double-layer and pseudo-capacitive methods. This is achieved by forming a composite structure of metal oxides deposited on a high quality (i.e. conducting) graphene support. The metal oxide is formed via a unique (patent applied for) process involving simultaneous exfoliation of the graphene and deposition of the oxide thereon, which ensures that the two materials are in intimate contact. Moreover, this process has already been proven at kg scale by First Graphene UK Ltd. and would use similar process equipment to their graphene exfoliation plant currently scaled at 100 tonne/yr. Key benefits are availability of potentially high performing, consistent, graphene / transitional metal hybrids, backed by academic and industrial know-how and an exclusive licence.
Applications
Supercapacitors are being evaluated as an alternative and complementary energy storage capability that offer high power-density, with multiple charge/discharge cycles and short charging times. They are already adopted in laptops, actuators (Airbus A380) and combined with Li-ion batteries in hybrid electric vehicles. In the hybrid EV applications, having an ultracapacitor subsystem enables higher power charging and discharging enabling the use of a lower specification Li-ion battery.