Capacitors Based on Polypyrrole Nanowire Electrodeposits

Ramírez, Andrés M. R.; Valle, M.; Ortega, Eduardo; Díaz, F. R.; Gacitúa, Manuel

doi:10.3390/polym14245476

Cited by 7 publications

(7 citation statements)

References 48 publications

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“…The electrosynthesis of poly(3,4-ethylenedioxythiophene) nanowires (PEDOT-nw) is carried out on a conducting glass electrode previously modified according to the methodology already reported [44][45][46] : a thin layer of PEDOT is electrodeposited on glass coated with a layer of indiumdoped tin oxide (ITO, PGO 10 Ω cm À1 ). Over this, a layer of mesoporous silicon oxide is now electrosynthesized (ITOjPEDOTjSiO 2 ), which acts as a template to finally electrodeposit the PEDOT nanowires, which grow in the confined spaces in the channels (or pores) of the template.…”

Section: Methodsmentioning

confidence: 99%

“…The specific capacitance (C) for modified electrode is calculated from cyclic voltammetry using Equation (1). 46 C ¼…”

Section: Methodsmentioning

confidence: 99%

“…The specific capacitance ( C ) for modified electrode is calculated from cyclic voltammetry using Equation () 46

C = \frac{\int_{E_{1}}^{E_{2}} i (E) d (E)}{2 vm (E_{2} - E_{1})}

where the value of

\int_{E_{1}}^{E_{2}} i (E) d (E)

corresponds to the total charge (positive and negative sweep), V is the scan rate, and m is the mass of the polymer, and E 2 and E 1 are the inversion potentials of the cyclic voltammetry, which was calculated from the methodology described by del Valle et al 31 …”

Section: Methodsmentioning

confidence: 99%

“…However, despite having a high specific capacity, its stability is almost 25% lower after 1000 cycles. This is mainly due to its easy over‐oxidation in aqueous systems, 46 so it is proposed that PEDOT should offer better properties than PPy.…”

Section: Introductionmentioning

confidence: 99%

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Capacitors based on PEDOT nanowire electrodeposits

Gacitúa,

del Valle,

Ramírez

2023

J of Applied Polymer Sci

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The capacitive properties of poly(3,4‐ethylenedioxythiophene) nanowires (PEDOT‐nw) obtained in situ by the electrosynthesis of EDOT in acetonitrile by cyclic voltammetry on a transparent ITO electrode that has been previously modified with a thin layer of PEDOT, on which mesoporous SiO2 is deposited. Silica acts as a template for the generation of polymer nanowires. The voltammetric profiles are consistent with a large increase in the surface area of the electrode, while their Raman spectroscopy and SEM microscopy demonstrate the formation of polymer nanostructures on the electrode surface. Also, by SEM, the presence of PEDOT deposit is verified in the form of nanowires 30 nm in diameter. On the other hand, galvanostatic measurements show a 20 times higher specific capacity for PEDOT‐nw (516.12 Fg−1) compared to PEDOT bulk (19.62 Fg−1). In the case of PEDOT‐nw, it is also worth noting a 92.3% retention capacity after 1000 successive charge/discharge cycles. Thus, it is verified that PEDOT‐nw modified electrodes are an excellent candidate to be used in polymer‐based capacitors.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The specific capacitance (C) for modified electrode is calculated from cyclic voltammetry using Equation (1). 46 C ¼…”

Section: Methodsmentioning

confidence: 99%

“…The specific capacitance ( C ) for modified electrode is calculated from cyclic voltammetry using Equation () 46

C = \frac{\int_{E_{1}}^{E_{2}} i (E) d (E)}{2 vm (E_{2} - E_{1})}

where the value of

\int_{E_{1}}^{E_{2}} i (E) d (E)

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Capacitors based on PEDOT nanowire electrodeposits

Gacitúa,

del Valle,

Ramírez

2023

J of Applied Polymer Sci

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show abstract

“…26 Because pyrrole has high solubility in water and exhibits a low oxidation potential, it can be easily oxidized and polymerized into PPy through electrosynthesis. [27][28][29] Therefore, coating PPy on CA using an electrochemical method theoretically prevents static electricity and improves electrostatic safety.…”

Section: Introductionmentioning

confidence: 99%