Work

Enhanced asymmetric supercapacitor performance using 2D Ni2P2O7 nanoplates with high specific capacitance

Year: 2026

Type: article

Abstract: Nickel pyrophosphate (NiP) electrodes were produced via a hydrothermal method for supercapacitor applications. The structural properties of the prepared samples were thoroughly investigated using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). FESEM and TEM were used to assess the morphological growth. The prepared NiP samples exhibited a well-defined two-dimensional (2D) nanoplate architecture with linked porosity networks, which provide numerous electroactive sites and facilitate efficient ion diffusion and quick electron transport. Additionally, specific surface area of all the prepared samples were carried out by using BET analysis. The optimized NiP electrode achieved a high specific capacitance of 1054 F/g at 5 mA/cm 2 current density and 80.82% capacitance retention after 5000 cycles. An asymmetric device fabricated with PVA-KOH gel electrolyte delivered a capacitance of 121 F/g, with an energy density of 36 Wh/kg and power density of 4800 W/kg. EIS confirmed the NiP-9 electrode's superior charge transport, showing low resistances, a short relaxation time and enhanced ionic conductivity. These results highlight NiP electrodes as promising, scalable materials for high-performance, sustainable supercapacitors and future energy storage technologies.

Source: Journal of Energy Storage

DOI: 10.1016/j.est.2026.121717

Authors: A.A. Yadav, L.D. Namade, P.K. Pawar, J.B. Yadav, K.Y. Rajpure

Institution: Shivaji University

Language: English

Topic: Supercapacitor Materials and Fabrication

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,560