In situ vanadophosphomolybdate impregnated into conducting polypyrrole for supercapacitor

Vannathan, Anjana Anandan; Maity, Sukanya; Kella, Tatinaidu; Shee, Debaprasad; Das, Partha Pratim; Mal, Sib Sankar

doi:10.1016/j.electacta.2020.137286

Cited by 27 publications

(17 citation statements)

References 70 publications

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“…This affirms the presence of the integrated PVMo 11 polyanion structure. The bands at 2933, 2870, 1630, 1586, 1384, and 1040 cm –1 ascribed to the aliphatic C–H bonds, CO, C–OH, C–O–C, and C–O, respectively, upholding the GO integration. − …”

Section: Resultsmentioning

confidence: 94%

Polyoxomolybdate–Polypyrrole–Graphene Oxide Nanohybrid Electrode for High-Power Symmetric Supercapacitors

Maity

Biradar

et al. 2021

Energy Fuels

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Supercapacitors have emerged as one of the most promising candidates for high-performance, safe, clean, and economical routes to store and release of nonfossil energy. Designing hybrid materials by integrating double-layer and pseudocapacitive materials is crucial to achieving high-power and high-energy storage devices simultaneously. Herein, we synthesized a polyoxomolybdate–polypyrrole–graphene oxide nanohybrid via a one-pot reaction. The inclusion of polypyrrole enables a uniform distribution of the polyoxomolybdate clusters; it also confines the restacking of graphene oxide nanosheets. The structural and morphological analysis to unveil the nanohybrid architecture implies excellent interfacial contact, enabling fast redox reaction of polyanions, and a quick transfer of charge to the interfaces. Electrochemical characteristics tested under a two-electrode system exhibit the highest capacitance of 354 F g–1 with significantly high specific energy and power of 49.16 Wh kg–1 and 999.86 W kg–1, respectively. In addition, the cell possesses a high-rate capability and long cycle life by maintaining 96% of its capacitance over 5000 sweeping cycles. The highest specific power of ∼10 000 W kg–1 was computed with Coulombic efficiency of 92.30% at 5 A g–1 current density. Electrochemical impedance spectroscopy additionally reveals enhanced redox charge transfer due to double hybridization. Furthermore, it also demonstrates the impedance and capacitive behavior of supercapacitor cells over a definite frequency regime.

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Section: Resultsmentioning

confidence: 94%

Polyoxomolybdate–Polypyrrole–Graphene Oxide Nanohybrid Electrode for High-Power Symmetric Supercapacitors

Maity

Biradar

et al. 2021

Energy Fuels

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“…Similarly, the P-XRD pattern of PV 2 Mo 10 showed similar diffraction angles (2θ) (9.76, 16.96, 21.41, 26.45, 27.75, 28.99, and 31.72°) and exhibited high crystalline material. 30 After doping both POMs on the backbone of PIn in situ, the number of diffraction angles was reduced, indicating the amorphous nature of the materials, and the loss of crystallinity of POMs is distinctly visible in Figure 3 .…”

Section: Resultsmentioning

confidence: 98%

“… 34 The FTIR of the two POMs (PVMo 11 and PV 2 Mo 10 ) is reported elsewhere. 30 Figure 1 B, C represents the FTIR of the PIn/PVMo 11 and PIn/PV 2 Mo 10 hybrid electrodes, which showed the retained chemical structure of both POMs (PVMo 11 and PV 2 Mo 10 ) and characteristic bands at 1058 (1055, νP–O), 960 (961, νMo=O), and 744 (νV=O) cm –1 , respectively. Furthermore, the POM's characteristic bands were also observed in the hybrid materials and confirmed the impregnation of POMs on the PIn surface.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal decomposition of both POMs is well documented in a published article. 30 The weight losses of doped PVMo 11 and PV 2 Mo 10 on PIn are depicted in Figure 2 . The first weight loss of 3.55% at 63.56 °C corresponds to the moisture removal from the hybrid material ( Figure S1g,h ).…”

Section: Resultsmentioning

confidence: 99%

“… 29 Recently, Vannathan et al synthesized two PPy/H 4 [PVMo 11 O 40 ] and PPy/H 5 [PV 2 Mo 10 O 40 ] composites in situ, and a very high capacitance of 562 F/g was observed at 0.2 A/g in a H 2 SO 4 electrolyte medium in two-electrode system. 30 Pedro Gomez-Romero et al synthesized the PPy-Npipes, PW 12 /PPy, and PMo 12 /PPy and reported 204.5, 341, and 294.1 F/g of capacitance by using the three-electrode system in a 1 M H 2 SO 4 electrolyte. 31 Cuentas-Gallegos et al prepared H 3 PMo 12 O 40 /PAni and found a 120 F/g specific capacitance in a two-electrode system, and they used Nafion117 and sulfuric acid as an electrolyte.…”

Section: Introductionmentioning

confidence: 99%

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One-Pot Synthesis of Polyoxometalate Decorated Polyindole for Energy Storage Supercapacitors

et al. 2021

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The demand for energy storage supercapacitor devices has increased interest in completing all innovative technologies and renewable energy requirements. Here, we report a simple method of two polyoxomolybdate (H 4 [PVMo 11 O 40 ] and H 5 [PV 2 Mo 10 O 40 ]) doped polyindole (PIn) composites for electrochemical supercapacitors. The interactions between polyoxomolybdates and PIn were measured by Fourier transform infrared spectroscopy (FTIR), and powder XRD, and stability was measured by thermogravimetry. The field emission scanning microscopy (FESEM) was employed to investigate the morphology of the materials. The electrochemical measurements show that the PIn/PV 2 Mo 10 electrode exhibits a higher capacitance of 198.09 F/g with an energy density of 10.19 Wh/kg and a power density of 198.54 W/kg at 0.2 A/g current density than the PIn/PVMo 11 electrode. Both electrodes show a pseudocapacitance behavior due to the doping of redox-active polyoxomolybdates on the PIn surface and enhance the electrochemical properties. The electrodes’ capacitive nature was measured by electrochemical impedance spectroscopy (EIS), which shows that the PIn/PVMo 11 electrode has a resistive nature within the electrode–electrode interface. Moreover, the PIn/PV 2 Mo 10 electrode offers remarkable cycle stability, retaining ∼84% of its capacitance after 10,000 cycles (∼83% for the PIn/PVMo 11 electrode). The higher specific capacitance, faster charge/discharge rates, and higher cycle stability make them promising electrodes in supercapacitors.

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POM‐based Nanomaterials for Supercapacitors

Alves,

Alves

2024

Applied Polyoxometalate‐based Electrocatalysis

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In situ vanadophosphomolybdate impregnated into conducting polypyrrole for supercapacitor

Cited by 27 publications

References 70 publications

Polyoxomolybdate–Polypyrrole–Graphene Oxide Nanohybrid Electrode for High-Power Symmetric Supercapacitors

Polyoxomolybdate–Polypyrrole–Graphene Oxide Nanohybrid Electrode for High-Power Symmetric Supercapacitors

One-Pot Synthesis of Polyoxometalate Decorated Polyindole for Energy Storage Supercapacitors

POM‐based Nanomaterials for Supercapacitors

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