Use of 1,10-Phenanthroline as an Additive for High-Performance Supercapacitors

A. Borenstein, S. Hershkovitz, A. Oz, S. Luski, Y. Tsur, D. Aurbach

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

In this study, we present the positive effect of 1,10-phenanthroline as an electrolyte additive that is strongly adsorbed on activated carbon electrodes, thereby adding effective redox activity to their initially capacitive interactions with electrolyte solutions. We obtain a stable capacitance of 320 F/g for the negative electrode and 190 F/gelectrode for full symmetric supercapacitor cells, operating up to 3.4 V in nonaqueous media, during many thousands of cycles. This corresponds to a specific capacity of 180 (mA h)/gelectrode. The high voltage and capacity of these systems can pave the way for developing high-energy-density pseudocapacitors that may be able to compete with battery systems. We explored the mechanisms of the electrode interactions using electrochemical tools, including impedance spectroscopy. (Graph Presented).

Original languageEnglish
Pages (from-to)12165-12173
Number of pages9
JournalJournal of Physical Chemistry C
Volume119
Issue number22
DOIs
StatePublished - 4 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

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