Preparing MnO 2/PSS/CNTs composite electrodes by layer-by-layer deposition of MnO 2 in the membrane capacitive deionisation

Juan Yang, Linda Zou, Huaihe Song

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

It is of great interest to control the pore structure, conductivity and electrochemical activity properties of electrode materials, as their capacitance in the electrosorption process is determined by these properties. These properties can be modified effectively during the synthesis process. The layer-by-layer deposition approach was employed to prepare a manganese oxide (MnO 2)/carbon nanotubes (CNTs) composite. In this study, Polystyrene Sodium Sulfonate (PSS) facilitated the dispersion of CNTs and even growth of MnO 2. The resulting composite material was used for electrodes in the membrane capacitive deionisation (MCDI) process and a high salt removal efficiency of 96.8% was achieved, with an ion adsorption capacity of 80.4μmol/g of MnO 2/PSS/CNTs electrode material. Conversely, a MnO 2/CNTs composite that was prepared using a hydrothermal synthesis process did not show such excellent advantages.

Original languageBritish English
Pages (from-to)108-114
Number of pages7
JournalDesalination
Volume286
DOIs
StatePublished - 1 Feb 2012

Keywords

  • Composites
  • Layer-by-layer deposition
  • MCDI
  • MnO
  • PSS

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