Doped butylmethylpyrrolidinium-dicyanamide ionic liquid as an electrolyte for MnO2 supercapacitors

Yun Shan Li, I. Wen Sun, Jeng Kuei Chang, Chung Jui Su, Ming Tsung Lee

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Butylmethylpyrrolidinium-dicyanamide (BMP-DCA) ionic liquid (IL), which enables the pseudocapacitive behavior of a MnO2 electrode, performing over a wide potential range of 3 V, is considered to be a promising electrolyte for supercapacitors. Various additives are doped in this IL electrolyte in attempt to further improve the electrochemical performance of MnO2; NaDCA is found to be the most effective. An appropriate concentration (∼0.01 M) of NaDCA in the IL can optimize the capacitance of the MnO2 electrode; the values are 100 and 125 F g-1 at 25 and 50 °C, respectively. The NaDCA-doped IL is superior to traditional aqueous electrolytes for high-energy, high-power, elevated-temperature, and long-life MnO 2 supercapacitor applications.

Original languageEnglish
Pages (from-to)6274-6279
Number of pages6
JournalJournal of Materials Chemistry
Volume22
Issue number13
DOIs
Publication statusPublished - 2012 Apr 7

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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