Two-dimensional (2-D) materials have been a promising material platform for making powerful energy devices including highly flexible energy storage devices. Owing to their advantageous features of flexibility, large surface area and open ion transport pathway within 2D layers, highly electroactive 2-D transition-metal oxide and phosphate nanosheets materials show promise in flexible supercapacitors with high power and energy densities. Here I will present our recent progress on chemically integrated graphene/inorganic hybrid 2-D materials to build ultraflexible, high-performance energy storage devices. One example is the integrated hybrid vanadyl phosphate VOPO4/graphene ultrathin-film solid-state pseudocapacitors, and the other is the MnO2/graphene hybrid nanostructures based flexible planar supercapacitors. These hybrid structures not only take advantage of excellent electronic conductivity of graphene nanosheets but also introduce more electrochemically active surfaces for absorption/desorption of electrolyte ions, which can greatly facilitate charge transport during electrochemical processes.

Chemically integrated graphene/inorganic hybrid 2D materials for flexible energy storage devices

248th National Meeting (2014)

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