Low temperature water based electrolytes for MnO2/carbon supercapacitors

Alexander J. Roberts, Angela F.Danil De Namor, Robert C.T. Slade

    Research output: Contribution to journalArticlepeer-review

    51 Citations (Scopus)

    Abstract

    Birnessite nanotubes and activated carbon electrodes have been used in supercapacitor cells to assess the performance of new aqueous based electrolyte systems at temperatures as low as -30 °C. The addition of ethylene glycol to aqueous sodium, lithium, potassium and ammonium sulfates has resulted in electrolytes that are still in liquid phase at such low temperatures. Extensive electrochemical testing showed that in such systems, operation of these aqueous based supercapacitors is possible at -30 °C with a specific capacitance of over 30 F g(-1) and good cycleability.
    Original languageEnglish
    Pages (from-to)3518-3526
    Number of pages9
    JournalPhysical Chemistry Chemical Physics
    Volume15
    Issue number10
    Early online date28 Jan 2013
    DOIs
    Publication statusPublished - 14 Mar 2013

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