New asymmetric and symmetric supercapacitor cells based on nickel phosphide nanoparticles

Metal Phosphides and Phosphates‐based Electrodes for Electrochemical Supercapacitors

“…In contrast, the Ni 2 P/rGO hybrid‐type delivered 2354 and 946 F g −1 at the same current densities ( Figure ). This confirmed that the presence and dispersion of graphene sheets in the hybrid is important for enhancing the pseudocapacitance of Ni 2 P. Another example is the work by Du et al, et al, who reported the successful preparation of Ni 2 P nanoparticles with an average size of ≈6–11 nm by a facile one‐step method. The capacitance of thus developed Ni 2 P electrode was 600.1 F g −1 at the current density of 1 A g −1 .…”

Newly Design Porous/Sponge Red Phosphorus@Graphene and Highly Conductive Ni2P Electrode for Asymmetric Solid State Supercapacitive Device With Excellent Performance

“…The diffraction patterns of Ni 2 P-1 and Ni 2 P-2 showed peaks at 40.8°, 44.6°, 47.3°, and 54.2° which can be attributed to the (111), (201), (210), and (300) planes of the hexagonal phase of the Ni 2 P (JCPDF card No. 03-0953), respectively [ 16 , 18 ]. No other peaks resulting from other phases were observed, confirming the purity of the samples.…”

“…Additionally, it has a high theoretical capacitance value of 2601 F g −1 [12,15]. However, few studies have reported its use as an electrode in half-cell and full-cell assemblies that show better electrochemical supercapacitance performance and energy density [12,[14][15][16][17][18][19][20].…”

“…To obtain high energy and power densities, the development of negative carbonaceous electrodes is also important [ 19 , 21 ]. Various types of materials have been targeted for developing negative electrodes for use in hybrid supercapacitor devices; e.g., owing to their high power density, large surface area, and long life cycle, carbon- (CNT, AC) and graphene-based materials have been extensively employed as the most preferred electrode materials for electric double-layer capacitors (EDLC) [ 18 , 19 , 22 ]. Furthermore, graphene and CNT are considered to be good candidates owing to their large surface area and chemical stability [ 19 , 22 ].…”

The effects of deposition time and current density on the electrochemical performance of flexible and high-performance MnO2@PFG composite electrodes

“…18 The specic capacitance of pseudocapacitors is 10-100 times higher than that of EDLCs. 19 Among different types of pseudocapacitor electrodes, transition metal-based compounds including oxides, 20 phosphides 21,22 and nitrides 23 are always receiving specic attention due to their abundance in nature and high theoretical capacitance. 24,25 Transition metal oxides such as RuO 2 , NiO, CoO x , 26 NiP, 22,27 and TiN 28 are oen used as electrode materials for fast and reversible redox reactions near the surface of active materials.…”