Ultra-thin solution-based coating of molybdenum oxide on multiwall carbon nanotubes for high-performance supercapacitor electrodes

Imran Shakir, Muhammad Tahir Nadeem, Muhammad Shahid, Dae Joon Kang

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Uniform and conformal coating of ultrathin molybdenum oxide (MoO 3) thin film onto conducting MWCNTs was successfully synthesized through a facile, nontoxic and generally applicable precipitation method, followed by a simple heat treatment. The ultrathin MoO3 coating enables a fast and reversible redox reaction which improves the specific capacitance by utilizing the maximum number of active sites for the redox reaction, while the high porosity of the MWCNTs facilitates ion migration in the electrolyte and shorten the ion diffusion path. The ultrathin MoO3 coated MWCNTs electrodes show a very high specific capacitance of 1145 Fg -1 in 2 M Na2SO4 aqueous solution when 5 nm thick MoO3 was considered alone despite the low weight percentage of the MoO3 (16wt%). Furthermore, the ultrathin MoO3 coated MWCNTs supercapacitor electrodes exhibited excellent cycling performance of > 97% capacitance retention over 1000 cycles. © 2013 Elsevier Ltd.
Original languageEnglish (US)
Pages (from-to)138-142
Number of pages5
JournalElectrochimica Acta
Volume118
DOIs
StatePublished - Feb 2014

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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