Asymmetric supercapacitors based on nickel decorated graphene and porous graphene electrodes

Recent advancements in 3D porous graphene-based electrode materials for electrochemical energy storage applications

“…16B. 97 Such high capacitance is due to the synergic interaction of graphene with nickel nanoparticle composition coated onto the nickel foam disk. Similarly, Zhou et al studied the symmetric capacitance of porous graphene/composite using activated silk cocoon fibroins/exfoliated graphene (represented as KCC) as a starting material.…”

“…However, the developed ASC with Ni-TEGO as positive and TEGO negative electrodes in 3.5 M KOH electrolyte medium showed impressive specific energy of 37 Wh/kg at 40 mA/g and 10 Wh/kg at 10 A/g of applied current density respectively. The assembled ASC electrodes possessed excellent capacitance retention of 72% over 10,000 cycles as shown in Fig.16B[97]. Such high capacitance is due to the synergic interaction of graphene with nickel nanoparticle composition coated onto thePage 16 of 46 Materials Advances Materials Advances Accepted Manuscript Open Access Article.…”

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

“…The electrochemical performance of the fabricated cell described above suggests that the synthesized material is a potential material for real-time energy storage devices. Figure compares the energy density of the PANI/GO-Azo//AC asymmetric supercapacitor reported in this work with the other supercapacitors reported in the literature. − The cycling stability and Coulombic efficiency of the fabricated cell were also studied and are depicted in Figure e,f. The results exhibited a capacitance retention of 76.5% with a Coulombic efficiency of 96.5% even after 5000 cycles.…”

Recent advances in Ni-materials/carbon nanocomposites for supercapacitor electrodes

“…94 The supercapacitor of pure graphene (À) with a Ni/graphene (+) electrode reached a specific energy of 37 W h kg À1 at 5 kW kg À1 and good reversibility. 95 Moreover, carbon-coated nano-Ni 2 P (phosphides)/rGO (Ni 2 P/C/rGO) was constructed and the optimal Ni 2 P/C/rGO exhibited an excellent capacitance of 1338.8 F g À1 . It was enabled for use in supercapacitors containing an N-doped porous carbon sheet (as the opposite electrode) representing an excellent energy density of 33.4 W h kg À1 at 792.1 W kg À1 .…”