Synthesis of a spherical carbon-TiO 2 composite as electrode material for capacitive deionization

Sun Kyung You, Jeong Jin Yang, Seongki Ahn, Soo Gil Park*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Activated carbon is widely used as an electrode material for capacitive deionization. However, it has low wettability with electrolytes and a low ion-adsorption capacitance. To enhance the wettability of activated carbon, in this study, a carbon-metallic oxide composite was synthesized using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)-block copolymer and titanium dioxide (TiO 2 ). The TiO 2 supporting material was synthesized by a sol-gel method, and activated carbon was prepared by high-temperature calcination at 550 °C in a nitrogen atmosphere. The active material containing 50 % TiO 2 exhibited the highest positive and negative capacitances of 109.5 and 121.3 F g -1 , respectively. Finally, when this material was used as a capacitive deionization electrode, the maximum ion removal rate was approximately 92 %. These results indicate that the carbon-TiO 2 composite electrode was more effective than the raw carbon electrode. In the end, we demonstrated the potential of a metallic oxide with activated carbon for desalination water treatment.

Original languageEnglish
Pages (from-to)4683-4692
Number of pages10
JournalInternational Journal of Electrochemical Science
Issue number5
Publication statusPublished - 2019


  • Capacitive deionization
  • Carbon-TiO composite
  • TiO
  • Total dissolved solids
  • Triblock copolymer

ASJC Scopus subject areas

  • Electrochemistry


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