Polypyrrole Electrodes as Cathodes in a Rechargeable Cell

Vidanapathirana, K. P.; Careem, M.A.; Skaarup, Steen; West, Keld

doi:10.1142/9789812776259_0034

Cited by 16 publications

(22 citation statements)

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“…Later work showed, however, that in this system also, the mechanism of actuation is complex: It may involve the simultaneous motion of anions and cations, as well as a significant amount of solvent molecules, e.g. H20 [ 14,15]. The reversible movement of water was shown to be responsible for the major part of the volume change, and thereby the actuation effect [16].…”

Section: Introductionmentioning

confidence: 94%

Ion and solvent transport in polypyrrole: Experimental test of osmotic model

Velmurugu

Skaarup

2005

Ionics

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Abstract. Ion and solvent transport in the conjugated polymer actuator material, polypyrrole doped with the immobile anion dodecyl benzene sulphonate, has been investigated by simultaneous cyclic voltammetry and Electrochemical Quartz Crystal Microbalance measurements. The purpose was to elucidate the precise nature of the mobile species during redox cycling, and to seek confirmation for the osmotic mechanism of actuation. Three testable aspects of the model were confirmed: The number of inserted H20 molecules decreases with electrolyte concentration; at the same time the mechanism gradually changes from almost pure cation transport to ca. equal amount of anion transport; exchanging Br for C1-ions has only negligible effect at lower concentrations at equal osmotic pressures. Approximately, 4 H20 molecules are tightly bound to each Na + ion at concentrations < 1 M.

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Section: Introductionmentioning

confidence: 94%

Ion and solvent transport in polypyrrole: Experimental test of osmotic model

Velmurugu

Skaarup

2005

Ionics

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“…These polymers have many interesting and unique physical, chemical and optical properties [1]. Since the ion transport in most conducting polymer films is much slower than the electron transport, ion transport governs their redox properties [2]. Among the conducting polymers, polypyrrole (PPy) and its derivatives have attracted considerable attention because of their stability and potential use in actuators, sensors, batteries and capacitors.…”

Section: Introductionmentioning

confidence: 99%

A voltammetry study on the diffusion of counter ions in polypyrrole films

Careem

Velmurugu

Skaarup

et al. 2006

Journal of Power Sources

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“…The redox processes observed in Figure 2 are related to charge compensation mechanisms of polypyrrole doped dodecylbenzenesulfonate, discussed in detail elsewhere [23][24][25].…”

Section: à2mentioning

confidence: 88%

Urea Amperometric Biosensors Based on Nanostructured Polypyrrole

Massafera¹,

Torresi²

2011

Electroanalysis

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In this work, we report the development of urea biosensors using macroporous polypyrrole as electrochemical transducer. Nanostructured polypyrrole was synthesized using monodispersed polystyrene spheres (460 nm) as template. Nanostructured urea biosensors were assembled after immobilization of urease (an enzyme that hydrolyses urea to ammonia) on macroporous polypyrrole, which was carried out using two different procedures: covalent attachment or layer-by-layer (lbl) deposition. Results show that lbl assembly of urease on macroporous polypyrrole gives rise to biosensors with improved detection kinetics (as demonstrated by higher I max values) and tunable sensitivities. Comparison with bulk urea biosensors previously described in the literature demonstrates that the use of nanostructured polypyrrole as sensing platform enhances biosensor's analytical performances, mainly due to the availability of more active sites for enzyme immobilization.

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Polypyrrole Electrodes as Cathodes in a Rechargeable Cell

Cited by 16 publications

References 0 publications

Ion and solvent transport in polypyrrole: Experimental test of osmotic model

Ion and solvent transport in polypyrrole: Experimental test of osmotic model

A voltammetry study on the diffusion of counter ions in polypyrrole films

Urea Amperometric Biosensors Based on Nanostructured Polypyrrole

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