Enhanced electrical potential of thermoelectric power waves by Sb 2Te3-coated multiwalled carbon nanotube arrays

Seunghyun Hong, Wonyoung Kim, Seong Jae Jeon, Seong Chu Lim, Hoo Jeong Lee, Seungmin Hyun, Young Hee Lee, Seunghyun Baik

    Research output: Contribution to journalArticlepeer-review

    24 Scopus citations

    Abstract

    Thermoelectric power waves, where multiwalled carbon nanotubes coated with cyclotrimethylene trinitramine (MWCNT/TNA) directly convert chemical energy to electricity, have received considerable attention recently. However, the low Seebeck coefficient of carbon nanotubes has been regarded as a hurdle to increasing the electrical potential. Here, we present Sb2Te 3-coated MWCNT arrays prepared by a sputtering method. An analytical model predicts an increase in Seebeck coefficient of the annular multishell structure by ∼75%. The heterostructure coupled with exothermic chemical reaction of TNA demonstrates an increase in peak electrical potential of 175% (∼198 mV), compared with typical outputs of bare MWCNT/TNA (∼72 mV). A serial connection of two repeating units increased the peak potential by up to 406 mV.

    Original languageBritish English
    Pages (from-to)913-917
    Number of pages5
    JournalJournal of Physical Chemistry C
    Volume117
    Issue number2
    DOIs
    StatePublished - 17 Jan 2013

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