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Investigation of electrochemical features of a novel Ni2P2O7-Polyaniline nanohybrid as electroactive material in high-reliable supercapacitors

Year: 2024

Type: article

Abstract: A novel nanohybrid of Ni 2 P 2 O 7 -Polyanaline (NPP) has been engineered to study energy storage performance. The nanohybrid was fabricated by surface coating of Ni 2 P 2 O 7 layered nanostructure (NPL) with the conductive polymer polyaniline (PANI). Initially, pristine Ni 2 P 2 O 7 layered nanostructure (NPL) was synthesized through single-step hydrothermal approach. Subsequently, hybrid composite (NPP) was constructed using in-situ oxidative polymerization of aniline monomer. The structural, morphological, and compositional properties of synthesized samples were characterized via XRD , FTIR , SEM, TEM , XPS and BET analysis. The electrochemical performances of the materials were evaluated for supercapacitor performance using Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD) test, Electrochemical Impedance analysis (EIS), and cyclic stability assessments. The results demonstrated that the hybrid composite exhibited significantly enhanced capacitance of 1333.9 F/g at 1 mV/s, 1150 F/g at 1 A/g from CV and GCD measurements respectively, including impressive stability performance, retaining 95% of its capacitance over 7000 CV cycles. Furthermore, symmetrical supercapacitor device constructed using NPP electrodes and operated at potential window of 1.6 V. The assembled symmetric device demonstrated superior energy density , power density, and cycling performance. The improvements in the performance of the three and two-electrode systems are attributed to PANI coating on the NPL surface, indicating that the hybrid composite is promising candidate for highly reliable supercapacitors .

Source: Materials Today Sustainability

DOI: 10.1016/j.mtsust.2024.101054

Authors: Harish Chevulamaddi, Venkateswara Rao Kalagadda

Institution: Jawaharlal Nehru Technological University, Hyderabad

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: $3,000