Polymer Electrolyte Review

Einset, Alison G; Wnek, Gary E.

doi:10.1142/9789812831828_0015

Cited by 16 publications

(2 citation statements)

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“…Our results suggest that the conductivity enhancement of the PEDOT:PSS film by the treatment with CuCl 2 solution is not related to the ionic conductivity though some ions might remain in the PEDOT:PSS film after the treatment. The highest ionic conductivity observed for polymers is below 10 −2 S cm −1 at room temperature, much lower than the conductivity observed on the CuCl 2 -treated PEDOT:PSS films. The ionic conduction in a polymer may become higher if water is absorbed into the polymer.…”

Section: Resultsmentioning

confidence: 68%

“…Thus, the mechanism for the conductivity enhancement cannot be attributed to ionic cross-linking of the PSS chains as proposed by Ghosh et al They reported conductivity enhancement for polymer blends, such as PEDOT:PSS in poly(vinylpyrrolidone) (PVP) matrix, when bivalent cations, such as Mg 2+ , were added into aqueous solution of polymer blends, while no conductivity enhancement for pure PEDOT:PSS added with Mg 2+ . The dependence of the conductivity enhancement on the nature of the salts also evidences that the conductivity enhancement is not due to the ionic conductivity, since an ion with small size and monovalence usually has high ionic conductivity in polymer …”

Section: Resultsmentioning

confidence: 88%

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Salt-Induced Charge Screening and Significant Conductivity Enhancement of Conducting Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate)

2009

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This article reports a novel method to significantly enhance the conductivity of conducting poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films through a treatment with aqueous solutions of various salts, such as copper(II) chloride. Conductivity enhancement by a factor of about 700 was observed. Many salts were investigated, and the conductivity enhancement depended on the softness parameter of cations and the concentration of the salts in solution. A salt like copper(II) chloride or indium chloride, whose cation has positive softness parameter, could enhance the conductivity of the PEDOT:PSS film by 2 orders in magnitude, while other salt like sodium chloride or magnesium chloride, whose cation has negative softness parameter, gave rise to negligible effect on the conductivity. The mechanism for the conductivity enhancement was studied by various characterizations. It is attributed to PSS loss from the PEDOT:PSS film, and conformational change of PEDOT chains resulted from the salt-induced charge screening between PEDOT and PSS.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 88%