Carbon nanotube/graphene composite for enhanced capacitive deionization performance

Yasodinee Wimalasiri, Linda Zou

Research output: Contribution to journalArticlepeer-review

232 Scopus citations

Abstract

In this study, single-walled carbon nanotubes were combined with graphene oxide nanosheets in aqueous dispersion and then chemically reduced to form the carbon nanotube/graphene (CNT/G) composite as electrodes for capacitive deionization (CDI). The structure of the CNT/G composite was highly porous, with single-walled carbon nanotubes (SWCNTs) sandwiched between graphene sheets that functioned as spacers and provided diffusion paths for smooth and rapid ion conduction. The associated increase in the electrical double-layer capacitance enhanced capacitive deionization performance. The CNT/G composite achieved a specific capacitance of 220 F/g and an electrosorption capacity of 26.42 mg/g with 100% regeneration, showing great potential as a high performance electrode material in CDI applications.

Original languageBritish English
Pages (from-to)464-471
Number of pages8
JournalCarbon
Volume59
DOIs
StatePublished - Aug 2013

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