Abstract:
The invention provides a capacitive energy storage device comprising: at least one porous film infiltrated with an electrolyte; and one or more pairs of separated electrodes disposed on top of a first surface of the porous film, each electrode comprising a capacitive electrode material in ionic communication with the underlying porous film, wherein the electrolyte provides ionic communication between the separated electrodes via the internal porosity of the porous film.
Abstract:
Sulfur cathodes which include cellulosic compositions containing a plurality of anionically functionalised cellulose nanofibres are described. The anionically functionalised cellulose nanofibres are highly charged and have a low aspect ratio. The sulfur cathodes possess low porosity, high surface smoothness and facilitate the transport of Li ions while hindering the transport of polysulfide anions. Batteries employing the sulfur cathodes have high gravimetric and volumetric density.
Abstract:
A method of forming a conductive portion in an insulating material. The insulating material includes carbon and at least one other constituent. The method includes exposing the insulating material to ions to preferentially remove the other constituent.
Abstract:
A method of reducing graphene oxide (GO), the method comprising the steps of: suspending GO and dissolving an iodide in a liquid medium, whereby the dissolved iodide partially reduces the GO to obtain a liquid composition comprising partially reduced GO (prGO) and dissolved iodide, removing liquid medium from the liquid composition to form a graphitic layer comprising prGO and iodide, and irradiating the graphitic layer with UV radiation to further reduce the prGO and provide for a reduced form of graphene oxide.
Abstract:
An improved method for concentrating dispersions of graphene oxide, coating a substrate with a layer of a graphene oxide solution, and producing a supported graphene membrane stabilised by controlled deoxygenation; and graphene-based membranes that demonstrate ultra-fast water transport, precise molecular sieving of gas and solvated molecules, and which show great promise as novel separation platforms.
Abstract:
A method of forming a conductive portion in an insulating material. The insulating material includes carbon and at least one other constituent. The method includes exposing the insulating material to ions to preferentially remove the other constituent.