In situ vanadophosphomolybdate impregnated into conducting polypyrrole for supercapacitor

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dc.contributor.authorAnandan Vannathan, A.A.
dc.contributor.authorMaity, S.
dc.contributor.authorKella, T.
dc.contributor.authorShee, D.
dc.contributor.authorDas, P.P.
dc.contributor.authorMal, S.S.
dc.date.accessioned2026-02-05T09:27:46Z
dc.date.issued2020
dc.description.abstractThe fast modernization and advancement in lifestyle increase the consumption of power daily due to all innovative technologies, e.g., hybrid vehicles, solar cells, smart power grid, communication devices, artificial hearts, etc. Conducting organic polymer-based energy storage devices had attracted much attention due to the conductive nature for a long time. However, its application has been restricted because of swelling and shrinking capability during the charge and discharge cycle. The combination of redox-active inorganic metal oxides, such as polyoxometalates (multi-metal oxide cluster) with conduction polymers, could enhance the material's stability due to its fast multi-electron redox property. Here, we report the two polypyrroles combined vanadophosphomolybdates, namely PPy-H<inf>4</inf>[PVMo<inf>11</inf>O<inf>40</inf>] and PPy-H<inf>5</inf>[PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>] nanohybrid electrode materials. The PPy-H<inf>5</inf>[PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>] electrode material behaves as pseudocapacitance and can deliver an excellent capacitance of 561.1 F/g in 0.1 M H<inf>2</inf>SO<inf>4</inf> electrolyte solution at a 0.2 A/g current density, indicating capacitive composite material. The electrochemical impedance spectroscopy (EIS) reveals that PPy-H<inf>5</inf>[PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>] is more capacitive than PPy-H<inf>4</inf>[PVMo<inf>11</inf>O<inf>40</inf>] and PPy with equivalent series resistance (ESR) of 5.74 ?. The cell capacitance of PPy-H<inf>5</inf>[PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>] and PPy-H<inf>4</inf>[PVMo<inf>11</inf>O<inf>40</inf>] are found to be 5.38 and 9.15 mF, stipulating in small SC cell application. Likewise, the PPy-H<inf>5</inf>[PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>] nanohybrid electrode shows better responsive behavior with a relaxation time of 0.16 ms. Furthermore, the PPy-H<inf>5</inf>[PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>] electrode exhibits outstanding cycle stability, retaining ~95% of its capacitance after 4500 cycles as compare to PPy-H<inf>4</inf>[PVMo<inf>11</inf>O<inf>40</inf>] (~91%) electrode. © 2020
dc.identifier.citationElectrochimica Acta, 2020, 364, , pp. -
dc.identifier.issn134686
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2020.137286
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/23540
dc.publisherElsevier Ltd
dc.subjectArtificial heart
dc.subjectCapacitance
dc.subjectElectric discharges
dc.subjectElectric power transmission networks
dc.subjectElectric resistance
dc.subjectElectrochemical impedance spectroscopy
dc.subjectElectrodes
dc.subjectElectrolytes
dc.subjectElectron spin resonance spectroscopy
dc.subjectEnergy storage
dc.subjectMetals
dc.subjectNanostructured materials
dc.subjectOrganic polymers
dc.subjectPolymer solar cells
dc.subjectPolyoxometalates
dc.subjectRedox reactions
dc.subjectSupercapacitor
dc.subjectSwelling
dc.subjectCommunication device
dc.subjectConducting organic polymers
dc.subjectElectrolyte solutions
dc.subjectEquivalent series resistance
dc.subjectInnovative technology
dc.subjectInorganic metal oxides
dc.subjectMulti-electron redoxes
dc.subjectResponsive behaviors
dc.subjectPolypyrroles
dc.titleIn situ vanadophosphomolybdate impregnated into conducting polypyrrole for supercapacitor

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