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Synthesis of N-CuMe2Pc nanorods/graphene oxide nanocomposite for symmetric supercapacitor electrode with excellent cyclic stability
摘要： Recent progress in the construction of non-peripheral octamethyl-substituted copper(II) phthalocyanine (N-CuMe2Pc) has opened up new strategies for energy storage applications. Since metal phthalocyanines can deliver excellent redox activities, we have prepared composite based on different ratios of N-CuMe2Pc and graphene oxide (GO) through a simple ultrasound process and evaluated their electrochemical performance for supercapacitor applications. As-prepared composites exhibit superior electrochemical activities as the results of the synergistic effect. A maximum specific capacitance of 291.6 F g?1 is achieved for the G10P2 electrode (Graphene oxide 10 mg and N-CuMe2Pc 2 mg) at 0.5 A g?1 which two times higher than their individual components. Further, the fabricated symmetric device shows that the excellent cyclic stability of about 100.1% over 5000 cycles. The experimental findings ensure the potential application of copper-phthalocyanine/GO composite as an electrode material for the next-generation supercapacitor applications.
关键词： Nanocomposite,Specific capacitance,Cyclic stability,Graphene oxide,Phthalocyanine
更新于2025-09-23 15:23:52
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Exploring Synergistic effect of Ni <sub/>x</sub> Sn <sub/>2x</sub> S <sub/>4x</sub> Thiospinel with MWCNTs with Enhanced Performance in Dye Sensitized Solar cells, Hydrogen Evolution Reaction and as Supercapacitor
摘要： Trifunctional nickel tin sulfide (NixSn2xS4x) thiospinel like structure composited with multiwall carbon nanotubes (MWCNTs) (M–NixSn2xS4x) was synthesized by a facial method. The unit cell arrangement of prepared composite has been studied by Density Functional Theory (DFT) and the theoretical interpretation satisfactorily inferred the presence of synergistic effect between thiospinel and MWCNTs. High metallic conductivity and superior electrocatalytic activities of M–NixSn2xS4x composite plays a prominent diverse roles as counter electrode for dye sensitized solar cells (DSSCs) with 4.67 % efficiency when compared to Pt (5.23 %) at fluorine doped indium tin oxide (FTO), efficient catalyst like Pt for hydrogen evolution reaction (HER) with good cyclic stability and low over potential of ?41 mV at the cathode current density of 10 mA cm2 and Tafel slope of 43 mV/dec at graphite sheet electrode and as impressive capacitance material at graphite sheet electrode alternate to an expensive current collectors like Ni foam with a specific capacitance value of 1,200 Fg?1 at current density of 1 Ag?1 and long life span of 92.6 % retained up to 15,000 cycles.
关键词： HER,Thiospinel,hybrid supercapacitors,cyclic stability,low overvoltage,DSSCs
更新于2025-09-19 17:13:59