Synthesis and characterization of Ni2P2O7 thin film as a superior electrode material for high performance supercapacitors

et al. 2023

Preprint

Self Cite

The present work deals with the preparation of ferrous nickel pyrophosphate (Fe2Ni2P2O7) thin films via a facile approach namely chemical bath deposition. X-ray diffraction analysis evinces that the prepared Fe2Ni2P2O7 thin films are of monoclinic structure and crystallinity is improved by increase in Fe concentration with a preferential orientation along the (111) direction. The surface morphology analysis reveal the microsphere like morphology and uniform anchoring of Fe2 on Ni2P2O7 thin film surface, which is favorable for good charge transfer between the electrode and electrolyte interface. Electrochemical analysis shows that, the Fe2Ni2P2O7 film electrode offers a specific capacitance of 501 F/g with excellent electrochemical and cyclic stability. The capacitive and diffusive contributions to the total capacity of the electrode are studied by employing Trasatti and Dunn’s model. Further, the obtained value of ‘b’ in the modified power law ranges from 0.66 to 0.69 confirming both the capacitive and diffusive charge storage mechanism in the electrodes under study. The features and hybrid nature in storage property of Fe2Ni2P2O7 electrodes are unique and highlights them as promising candidates for energy storage application.

supporting

confidence: 56%

Exploring the electrochemical performance of Ferrous Nickel Pyrophosphate Thin Film Electrodes for Potential Supercapatior Applications

Nivetha¹,

Prabahar²,

et al. 2023

Preprint

Self Cite

“…The redox active nature of electrodes is witnessed by the nonlinear shape of GCD curves. [19,36,43] It is observed that by increasing current density values in a range ChemistrySelect 1-10 A/g, discharge time decreases maintaining the shape of the GCD curves. At lower current densities, film electrode gets enough time for insertion of OH À ions into the electrode sites and all the redox active sites become accessible for ionic adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 10(a–d) shows the galvanostatic charge‐discharge (GCD) curves of NP and MNP thin film electrodes in the potential range of −0.4 to 0.2 V Vs Hg/HgO at different current densities. The redox active nature of electrodes is witnessed by the nonlinear shape of GCD curves [19,36,43] . It is observed that by increasing current density values in a range 1–10 A/g, discharge time decreases maintaining the shape of the GCD curves.…”

Section: Resultsmentioning

confidence: 99%

Improved Electrochemical Performance of Ni₂P₂O₇ and Mn‐doped Ni₂P₂O₇ Electrode Materials for Supercapacitor Applications

Nivetha¹,

Prabahar²,

et al. 2023

ChemistrySelect

The development of electrode materials for supercapacitors is really progressive and it still poses a huge challenge for researchers in many aspects. Doping of transition metals is indeed effective method because fast interfacial charge transfer kinetics has demonstrated their potential supercapacitive nature. The present work submits the structural, morphological and electrochemical performances of nickel pyrophosphate (Ni2P2O7) and manganese doped nickel pyrophosphate (Mn‐Ni2P2O7) thin film electrodes synthesized by chemical bath deposition method. The crystal structure of Ni2P2O7 obtained through X‐ray diffraction (XRD) is confirmed to be monoclinic which remains unaltered despite of Mn doping concentration. Morphological studies reveal that crystalline phase of Mn is intimately anchored on the surface of Ni2P2O7 which is beneficial for better charge transfer between transition metal and transition metal phosphates. A specific capacitance value of 603 F/g is obtained for 3 M concentration of Mn doped Ni2P2O7 from galvanostatic charge‐discharge curve at current density 1 A/g. This value is noticeably higher than what is obtained for the pure Ni2P2O7 indicating that Mn doping enhances the electrochemical performance of Ni2P2O7 thin films.

“…The synthesized Ni 2 P 2 O 7 thin film electrode is found to be a promising candidate with tuned morphology for supercapacitive applications. [17][18][19]. The average crystallite size (D) is estimated using the Debye-Scherrer relation and obtained average crystallite size is 37.68 nm.…”

Section: Introductionmentioning

confidence: 99%

Ni2P2O7 Thin Film Electrode for High Performance Supercapacitor Applications

Nivetha¹,

Prabahar²,

et al. 2023

IJRASET

The electrochemical performances of the supercapacitor essentially rely on electrode materials. The transition metal phosphates have been attracted as electrode material for energy storage in supercapacitor. A valley-like Ni2P2O7 thin film electrode is synthesized by economic and reproducible chemical bath deposition technique. The high specific capacitance of Ni2P2O7 is obtained as 548 F/g at current density 1 A/g. The electrode delivered enhanced energy density of 14.47 Wh k/g at a power density 0.16 kW k/g. The results indicate that Ni2P2O7 is an exemplary supercapacitor candidate and it would lead to productive research in future energy storage applications.