Electrochemical properties of novel porous carbon based material synthesized from polycyclic aromatic hydrocarbons

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Michal Wagner, Carita Kvarnström, Ari Ivaska, Johan Bobacka
Förläggare: PERGAMON-ELSEVIER SCIENCE LTD
Publiceringsår: 2013
Tidskrift: Electrochimica Acta
Tidskriftsakronym: ELECTROCHIM ACTA
Volym: 105
Artikelns första sida, sidnummer: 384
Artikelns sista sida, sidnummer: 393
Antal sidor: 10
ISSN: 0013-4686
eISSN: 1873-3859


Abstrakt

Polycyclic aromatic hydrocarbons (PAHs) are interesting compounds from both fundamental and applied research points of view, because these molecules can be considered as well-defined cut-outs of graphene. Starting from relatively small PAHs it is possible to electrochemically synthesize in one easy step electroactive films consisting of larger PAH molecules. In the present work benzo(a)pyrene was used as the monomer and by potential cycling in propylene carbonate, porous films were obtained consisting of PAH molecules with an average number of carbon atoms in the range 40-60, evidenced by Raman and infrared spectroscopy. Electrochemical activity during oxidation of the resulting amorphous poly(benzopyrene) (PBP) films was determined in propylene carbonate and acetonitrile by in situ conductance measurements and electrochemical impedance spectroscopy. Additionally, based on impedance spectra a new equivalent circuit was proposed which accurately describes the electrochemical properties of the synthesized PBP films. The model was verified by comparing calculated conductivity values with experimental values obtained from in situ conductance measurements. It was found that PBP films exhibit fast ion transport with electrical conductivity of similar to 6.6 mS cm(-1). The results presented in this work imply that PBP is an interesting material for electrochemical applications.


Nyckelord

Doping reactions, Electroactive materials, Electrochemical impedance spectroscopy, Electrochemical synthesis, Polycyclic aromatic hydrocarbons

Senast uppdaterad 2019-13-12 vid 03:04