Chidembo, ATAboutalebi, SHKonstantinov, KJafta, CJLiu, HOzoemena, KI2014-02-262014-02-262014-01Chidembo, A.T, Aboutalebi, S.H, Konstantinov, K, Jafta, C.J, Liu, H and Ozoemena, K.I. 2014. In situ engineering of urchin-like reduced graphene oxide–Mn2O3–Mn3O4 nanostructures for supercapacitors. RSC Advances, vol. 4, pp 1-82046-2069http://pubs.rsc.org/en/content/articlelanding/2014/ra/c3ra44973d/unauth#!divAbstracthttp://hdl.handle.net/10204/7252Copyright 2014 Royal Society of Chemistry. This is an Open Access article. The journal authorizes the publication of the information herewith contained. Published in RSC Advances, vol. 4, pp 1-8We report the use of spray pyrolysis method to synthesize high surface area (BET surface area of 139 m2g-1) self–organized, micron sized urchin-like composites made up of reduced graphene oxide and needle-shaped manganese oxide (rGO-Mn2O3/Mn3O4). Maximum capacitances of 425 Fg-1 at 5 mVs-1 from a three electrode set up and 133 Fg-1 at a current density of 0.2 Ag-1 and were recorded using an asymmetric two electrode set up with graphene as the anode. The composite material also showed a capacitance retention of 83% over 1000 cycles. We attribute this remarkable performance to the high specific surface area due to the urchin-like hollow structures and synergy between the manganese oxide and reduced graphene oxide materials within the composite. Furthermore, this synthesis technique can be exploited further in the bulk synthesis of cost effective graphene-metal oxide hybrid materials for energy storage applications.enMetal oxidesManganese oxideNanostructuresArticleChidembo, A., Aboutalebi, S., Konstantinov, K., Jafta, C., Liu, H., & Ozoemena, K. (2014). In situ engineering of urchin-like reduced graphene oxide–Mn2O3–Mn3O4 nanostructures for supercapacitors. http://hdl.handle.net/10204/7252Chidembo, AT, SH Aboutalebi, K Konstantinov, CJ Jafta, H Liu, and KI Ozoemena "In situ engineering of urchin-like reduced graphene oxide–Mn2O3–Mn3O4 nanostructures for supercapacitors." (2014) http://hdl.handle.net/10204/7252Chidembo A, Aboutalebi S, Konstantinov K, Jafta C, Liu H, Ozoemena K. In situ engineering of urchin-like reduced graphene oxide–Mn2O3–Mn3O4 nanostructures for supercapacitors. 2014; http://hdl.handle.net/10204/7252.TY - Article AU - Chidembo, AT AU - Aboutalebi, SH AU - Konstantinov, K AU - Jafta, CJ AU - Liu, H AU - Ozoemena, KI AB - We report the use of spray pyrolysis method to synthesize high surface area (BET surface area of 139 m2g-1) self–organized, micron sized urchin-like composites made up of reduced graphene oxide and needle-shaped manganese oxide (rGO-Mn2O3/Mn3O4). Maximum capacitances of 425 Fg-1 at 5 mVs-1 from a three electrode set up and 133 Fg-1 at a current density of 0.2 Ag-1 and were recorded using an asymmetric two electrode set up with graphene as the anode. The composite material also showed a capacitance retention of 83% over 1000 cycles. We attribute this remarkable performance to the high specific surface area due to the urchin-like hollow structures and synergy between the manganese oxide and reduced graphene oxide materials within the composite. Furthermore, this synthesis technique can be exploited further in the bulk synthesis of cost effective graphene-metal oxide hybrid materials for energy storage applications. DA - 2014-01 DB - ResearchSpace DP - CSIR KW - Metal oxides KW - Manganese oxide KW - Nanostructures LK - https://researchspace.csir.co.za PY - 2014 SM - 2046-2069 T1 - In situ engineering of urchin-like reduced graphene oxide–Mn2O3–Mn3O4 nanostructures for supercapacitors TI - In situ engineering of urchin-like reduced graphene oxide–Mn2O3–Mn3O4 nanostructures for supercapacitors UR - http://hdl.handle.net/10204/7252 ER -