Poly(ortho-phenylenediamine-co-aniline) based copolymer with improved capacitance

A poly(ortho-phenylenediamine-co-aniline) copolymer is synthesized via the oxidative route, using a 1:1 M ratio of aniline to ortho-phenylenediamine (oPDA) and ammonium persulfate as the oxidizing agent. Infrared spectroscopy indicates that the copolymer contains the functional groups typically pres...

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Bibliographic Details
Published in:Journal of power sources 2017-10, Vol.366, p.233-240
Main Authors: Olmedo-Martínez, Jorge L., Farías-Mancilla, Bárbara I., Vega-Rios, Alejandro, Zaragoza-Contreras, E. Armando
Format: Article
Language:English
Subjects:
Capacitance
Conducting polymer
Poly(ortho-phenylenediamine)
Polyaniline
Supercapacitor
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Summary:A poly(ortho-phenylenediamine-co-aniline) copolymer is synthesized via the oxidative route, using a 1:1 M ratio of aniline to ortho-phenylenediamine (oPDA) and ammonium persulfate as the oxidizing agent. Infrared spectroscopy indicates that the copolymer contains the functional groups typically present in polyaniline and poly(ortho-phenylenediamine); whereas UV-vis-NIR spectroscopy shows that the copolymer adopts a phenazine-type structure. Cyclic voltammetry evidences the copolymer synthesis, as a redox peak at −65 mV, different from those exhibited by polyaniline (160 mV and 600 mV) or poly(o-phenylenediamine) (−240 mV) is observed. Finally, electrochemical impedance spectroscopy and the charge/discharge test provide support to propose the copolymer application in electrodes for supercapacitors. [Display omitted] •Polyaniline electrochemical properties are modified by copolymerization.•Copolymer structure strongly influences the specific capacitance.•Phenazine units provide greater stability during the charge/discharge cycles.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2017.09.030