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Polymers 2016, 8(11), 401; doi:10.3390/polym8110401

Characterization of Aniline Tetramer by MALDI TOF Mass Spectrometry upon Oxidative and Reductive Cycling

1
Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA
2
Cambridge Graphene Centre, Cambridge University, Cambridge CB3 0FA, UK
3
Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan
4
Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA
These two authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editors: Hsing-Lin Wang and Ping Xu
Received: 22 September 2016 / Revised: 25 October 2016 / Accepted: 10 November 2016 / Published: 15 November 2016
(This article belongs to the Special Issue Conjugated Polymers 2016)
View Full-Text   |   Download PDF [2359 KB, uploaded 15 November 2016]   |  

Abstract

By combining electrochemical experiments with mass spectrometric analysis, it is found that using short chain oligomers to improve the cycling stability of conducting polymers in supercapacitors is still problematic. Cycling tests via cyclic voltammetry over a potential window of 0 to 1.0 V or 0 to 1.2 V in a two-electrode device configuration resulted in solid-state electropolymerization and chain scission. Electropolymerization of the aniline tetramer to generate long chain oligomers is shown to be possible despite the suggested decrease in reactivity and increase in intermediate stability with longer oligomers. Because aniline oligomers are more stable towards reductive cycling when compared to oxidative cycling, future conducting polymer/oligomer-based pseudocapacitors should consider using an asymmetric electrode configuration. View Full-Text
Keywords: conducting polymers; oligomers; supercapacitors; degradation mechanism; mass spectroscopy conducting polymers; oligomers; supercapacitors; degradation mechanism; mass spectroscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, R.L.; Lin, C.-W.; Shao, Y.; Chang, C.W.; Yao, F.-K.; Kowal, M.D.; Wang, H.; Yeung, M.T.; Huang, S.-C.; Kaner, R.B. Characterization of Aniline Tetramer by MALDI TOF Mass Spectrometry upon Oxidative and Reductive Cycling. Polymers 2016, 8, 401.

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