King Abdullah University of Science and Technology

Shahid Rasul

Amira Alazmi

Pedro M F J Costa

The present invention is an improved method of production of graphenic materials used to store energy and the energy storage systems using such produced graphenic materials. Provided herein is a method of producing graphene oxide that includes oxidizing graphite powder in a mixture of HPOand HSOin the presence of KMnO, wherein the ratio of graphite powder to KMnOis about 1:9 by weight and the ratio of HPOto HSOis about 1:9 by volume, to produce graphene oxide; dispersing the graphene oxide in water at an acidic pH (e.g., about 0) to form a solution; adjusting the solution to about a neutral pH; and isolating the graphene oxide. An energy storage device is provided herein that includes the graphene oxide made by the disclosed methods or that includes the population (plurality) of reduced graphene oxide particles having the properties disclosed herein, such as batteries and supercapacitors.

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Thuwal, Saudi Arabia

Shahid Rasul