Ni(OH)2 nanosheets grown on porous hybrid g-C3N4/RGO network as high performance supercapacitor electrode

Abstract

A porous hybrid g-C3N4/RGO (CNRG) material has been fabricated through a facile hydrothermal process with the help of glucose molecules, and serves as an efficient immobilization substrate to support ultrathin Ni(OH)2 nanosheets under an easy precipitation process. It was found that the g-C3N4 flakes can uniformly coat on both sides of the RGO, forming sandwich-type composites with a hierarchical structure. It is worth noting that the introduction of the g-C3N4 can effectively achieve the high dispersion and avoid the agglomeration of the nickel hydroxide, and significantly enhance the synthetically capacitive performance. Owning to this unique combination and structure, the CNRG/Ni(OH)2 composite possesses large surface area with suitable pore size distribution, which can effectively accommodate the electrolyte ions migration and accelerate efficient electron transport. When used as electrode for supercapacitor, the hybrid material exhibits high supercapacitive performance, such as an admirable specific capacitance (1785 F/g at a current density of 2 A/g), desirable rate stability (retain 910 F/g at 20 A/g) and favorable cycling durability (maintaining 71.3% capacity after 5000 cycles at 3 A/g). Such desirable properties signify that the CNRG/Ni(OH)2 composites can be a promising electrode material in the application of the supercapacitor.

Cactus‐Like NiCoP/NiCo‐OH 3D Architecture with Tunable Composition for High‐Performance Electrochemical Capacitors

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A Novel CVD Growth of g‐C3N4 Ultrathin Film on NiCo2O4 Nanoneedles/Carbon Cloth as Integrated Electrodes for Supercapacitors

“…The existing investigations regarding g‐C 3 N 4 as electrode materials for supercapacitors mainly concentrated on g‐C 3 N 4 based composites. For example, the hybridization of g‐C 3 N 4 with α‐Fe 2 O 3 , MnO 2 , and Ni(OH) 2 resulted in better performance for supercapacitors when compared with their respective components. However, these researches did not achieve desired results because the two ingredients did not give full play to their advantages.…”

Designing of Carbon Nitride Supported ZnCo2O4 Hybrid Electrode for High-Performance Energy Storage Applications

“…In the application of water splitting, waste-water detoxification, solar cells and supercapacitors, g-C 3 N 4 carbon-based materials show superior performance because of its outstanding optical properties, high mechanical strength and thermal conductivity 8 . The nitrogen presence in g-C 3 N 4 provides more active sites and advances the capacitance while preserving the cyclability of the electrochemical device 9,10 . Therefore, the composite of g-C 3 N 4 and ZnCo 2 O 4 could have great advancement in rate capability and specific capacitance 9 .…”