Development of novel MnO2/nanoporous carbon composite electrodes in capacitive deionization technology

Juan Yang, Linda Zou, Huaihe Song, Zhengping Hao

Research output: Contribution to journalArticlepeer-review

162 Scopus citations

Abstract

Capacitive deionization (CDI) is a technology for desalination and water purification that charged ions are electrosorbed on the porous electrodes, thus its performance largely affected by choice of electrodes. In this paper, the MnO2/nanoporous carbon composites were prepared and used as electrodes in CDI. Salt removal efficiency for the MnO2/nanoporous carbon was 16.9μmol/g which was higher than 5.4μmol/g of the commercially available activated carbon (AC). The nanoporous carbons were synthesised using silica templates while their composites were prepared by a co-precipitation method and were characterised carefully. The capacitance of the MnO2/carbon composites (204.7F/g) was higher than the AC (98.6F/g). The capacitance increase may be attributed to the high surface area and suitable pore size distribution properties. Moreover, the MnO2 film provided a high surface adsorption capability and an effective cation intercalation.

Original languageBritish English
Pages (from-to)199-206
Number of pages8
JournalDesalination
Volume276
Issue number1-3
DOIs
StatePublished - 2 Aug 2011

Keywords

  • Capacitive deionization
  • MnO
  • Nanoporous carbon

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