Fabrication of g-C₃N₄ Nanomesh-Anchored Amorphous NiCoP₂O₇: Tuned Cycling Life and the Dynamic Behavior of a Hybrid Capacitor

Abstract

Developing a novel electrode material with better electrochemical behavior and extended cyclability is a major issue in the field of hybrid capacitors. In this work, we propose a novel strategy for the facile synthesis of nickel–cobalt pyrophosphate nanoparticles anchored on graphitic carbon nitride (NiCoP 2 O 7 /g-C 3 N 4 ) via the simple solvothermal method. Field emission scanning electron microscopy and transmission electron microscopy analysis revealed the uniform anchoring of NiCoP 2 O 7 nanocomposite on g-C 3 N 4 nanosheets. Benefitting from the effect of amorphous nature and a conductive matrix of the NiCoP 2 O 7 /g-C 3 N 4 (NP3) composite, the material achieves a specific capacitance of 342 F g –1 at a scan rate of 5 mV s –1 . Impressively, the electrode shows long-term cycling stability with 100% capacitance retention over 5000 cycles. Employing activated carbon as an anode and as-prepared NP3 as a cathode, the assembled asymmetric hybrid cell exhibits high-energy density and exceptional cyclability (specific capacitance retention over 10 000 cycles). The outstanding electrochemical and cyclic stability is attributed to the shortest electron-ion pathway with effective interfacial interaction. The low electronic resistance of the NiCoP 2 O 7 /g-C 3 N 4 nanocomposite is revealed by varying the bias voltage variation in the electrochemical impedance spectroscopy. Our results promise better utilization of the bimetallic pyrophosphate-anchored g-C 3 N 4 matrix as a potential electrode for high-performance energy storage devices.

Facile Preparation of Hierarchically Porous g‐C3N4 as High‐Performance Photocatalyst for Degradation of Methyl Violet Dye

“…13.1° and 27.4° correspond to diffraction of (100) and (002) crystal planes that are ascribed to the in‐plane structure repeating motif of trigonal N‐linkages and the interlayer stacking of the graphite‐like ing‐C 3 N 4 (Figure 1), which confirmed the formation of g‐C 3 N 4 [24] . The peak intensities of pg‐CN‐1, pg‐CN‐1.5 and pg‐CN‐2 materials are lower than that of g‐CN, which may be related to the introduction of defects after adding urea in raw materials and the destruction of the crystallinity of carbon nitride [25] …”

“…[24] The peak intensities of pg-CN-1, pg-CN-1.5 and pg-CN-2 materials are lower than that of g-CN, which may be related to the introduction of defects after adding urea in raw materials and the destruction of the crystallinity of carbon nitride. [25] The morphology and structure of the pg-CN materials were furtherobservedfrom SEM and TEM images (Figure 2). It is clear that all the pg-CN samplespossess stacking layer structure (Figure 2a-2c), and the honeycomb structures appear with increasing the amount of urea, just as more holes observed in pg-CN-2 material (Figure 2c).…”

Electrochemical performance of zinc carbodiimides based porous nanocomposites as supercapacitors

“…1241 cm − 1 and ca. 807 cm − 1 may be assigned to the C-N stretching mode and the out of plane breathing vibration characteristic of s-triazine ring system of g-C 3 N 4 , respectively [37]. For HPZC, the newly emerged IR peak at 2050 cm − 1 are attributed to asymmetrical stretching vibration of characteristic -N = C = N-bonding in ZnNCN, and the peak at ca.…”

In Situ Synthesis of CoCeSx Bimetallic Sulfide Nanoparticles on a Bi‐Pyrene Terminated Molecular Wire Modified Graphene Surface for Supercapacitors

“…the capability of the fabricated electrode with those reported on related electrodes is displayed in Figure 4(g). [34,[39][40][41][42][43][44][45][46][47] The resistances of the prepared electrodes were measured. The intercept on the X-axis relative to R s , which covers the resistance of solution to ion diffusion and the resistance instrument was determined.…”