Abstract: A method of making a polyelectrolyte complex membrane separator for a Lithium-Sulfur battery to support lean electrolyte operation, comprising the steps of: forming polyelectrolyte complex nanoparticles by the addition of polyethylenimine (PEI) to tannic acid (TA); adding bovine serum albumin (BSA); purifying the nanoparticles; re-dispersing the nanoparticles in water to form a nanoparticle suspension; and dipcoating a polyolefin membrane in the nanoparticle suspension.

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: A method of producing Sulfur cathodes for Li—S batteries utilising dry mixing of constituents (sulphur, carbon and binder) or semi-dry mixing. The resultant structure binds the neighbouring particles without covering them, i.e. by attaching a few parts of a particle to other neighbouring particles provides a solution for the successful cycling of thick and ultra-thick sulfur cathodes. Such an approach provides a robust thick cathode where particles are strongly bonded with minimal surface coverage with the polymer providing sufficient room to expand during lithiation. Bridging bonds are formed within the cathodes.