Masikhwa, T.M. (Tshifhiwa)Madito, M.J. (Moshawe)Bello, AbdulhakeemLekitima, Joel N.Manyala, Ncholu I.2017-05-112017-05-112017Masikhwa, TM, Madito, MJ, Bello, A, Lekitima, J & Manyala, N 2017, 'Microwave-assisted synthesis of cobalt sulphide nanoparticle clusters on activated graphene foam for electrochemical supercapacitors', RSC Advances, vol. 7, pp. 20231-20240.2046-206910.1039/C7RA02204Bhttp://hdl.handle.net/2263/60318Cobalt sulphide (Co9S8) nanoparticles clusters embedded in activated graphene foam (AGF) structure were prepared using microwave-assisted hydrothermal synthesis. Morphological characterization of as-prepared Co9S8/AGF showed that Co9S8 composed of cluster (sphere)-like nanoparticles embedded in the matrix of a porous sheet-like AGF. The synergy between the Co9S8 nanoparticles and AGF in the Co9S8/AGF composite showed predominantly an improvement in the porous nature (surface area and pore volume) of the Co9S8 and the electrical conductivity of the composite electrode. The composite exhibited a specific capacitance of 1150 F g-1 as compared to Co9S8 with specific capacitance of 507 F g-1 at a scan rate of 5 mV s-1 and good cycling stability in 6 M KOH electrolyte. Co9S8/AGF composite showed significant improvement on the specific capacitance compared to pure Co9S8 and specific capacitance values found in previously published reports by other studies for cobalt sulphidebased composites.en© The Royal Society of Chemistry 2017. This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence.High specific capacitanceGood cycle stabilityEnergy storageActivated graphene foam (AGF)Cobalt sulphide (Co9S8)Article