One-Minute Joule Annealing Enhances the Thermoelectric Properties of Carbon Nanotube Yarns via the Formation of Graphene at the Interface

Masaki Hada, Taisuke Hasegawa, Hirotaka Inoue, Makito Takagi, Kazuki Omoto, Daiki Chujo, Shogo Iemoto, Taihei Kuroda, Taiga Morimoto, Takuma Hayashi, Toru Iijima, Tomoharu Tokunaga, Naoshi Ikeda, Kazuhiro Fujimori, Chihiro Itoh, Takeshi Nishikawa, Yoshifumi Yamashita, Toshihiko Kiwa, Shin Ya Koshihara, Satoshi MaedaYasuhiko Hayashi

Research output: Contribution to journalArticle

Abstract

Interfaces in nanocarbon materials are highly important, as they determine the properties of carbon-based devices. In terms of carrier and thermal transport properties, the interfacial features are often more important than the intrinsic characteristics. Herein, we describe how 1 min Joule annealing of carbon nanotube (CNT) yarns can convert the interfacial amorphous carbon into graphene fragments. After 1 min Joule annealing, we have obtained multiwalled CNT yarns with extremely high Seebeck coefficients (±100 μV/K) and high thermoelectric power factor (400 and 1000 μW/mK2) at room temperature, both with or without polyethylenimine doping. Theoretical simulations and experimental measurements helped to determine the optimal annealing conditions in terms of a rapid transformation of the interfacial amorphous carbon between the bundled CNTs in the yarn into graphene fragments at ∼2000 K. The present approach represents significant progress in energy materials science, as it provides a guiding principle for the design of interfaces in nanocarbon materials with potential applications in energy-harvesting systems.

Original languageEnglish
JournalACS Applied Energy Materials
DOIs
Publication statusAccepted/In press - Jan 1 2019

Fingerprint

Carbon Nanotubes
Graphite
Graphene
Yarn
Carbon nanotubes
Amorphous carbon
Annealing
Polyethyleneimine
Seebeck coefficient
Multiwalled carbon nanotubes (MWCN)
Energy harvesting
Thermoelectric power
Materials science
Transport properties
Carbon
Doping (additives)
Temperature

Keywords

  • carbon nanotube
  • interface of carbon nanostructure
  • Joule annealing
  • structure transition-route maps
  • thermoelectric properties

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

One-Minute Joule Annealing Enhances the Thermoelectric Properties of Carbon Nanotube Yarns via the Formation of Graphene at the Interface. / Hada, Masaki; Hasegawa, Taisuke; Inoue, Hirotaka; Takagi, Makito; Omoto, Kazuki; Chujo, Daiki; Iemoto, Shogo; Kuroda, Taihei; Morimoto, Taiga; Hayashi, Takuma; Iijima, Toru; Tokunaga, Tomoharu; Ikeda, Naoshi; Fujimori, Kazuhiro; Itoh, Chihiro; Nishikawa, Takeshi; Yamashita, Yoshifumi; Kiwa, Toshihiko; Koshihara, Shin Ya; Maeda, Satoshi; Hayashi, Yasuhiko.

In: ACS Applied Energy Materials, 01.01.2019.

Research output: Contribution to journalArticle

Hada, M, Hasegawa, T, Inoue, H, Takagi, M, Omoto, K, Chujo, D, Iemoto, S, Kuroda, T, Morimoto, T, Hayashi, T, Iijima, T, Tokunaga, T, Ikeda, N, Fujimori, K, Itoh, C, Nishikawa, T, Yamashita, Y, Kiwa, T, Koshihara, SY, Maeda, S & Hayashi, Y 2019, 'One-Minute Joule Annealing Enhances the Thermoelectric Properties of Carbon Nanotube Yarns via the Formation of Graphene at the Interface', ACS Applied Energy Materials. https://doi.org/10.1021/acsaem.9b01736
Hada, Masaki ; Hasegawa, Taisuke ; Inoue, Hirotaka ; Takagi, Makito ; Omoto, Kazuki ; Chujo, Daiki ; Iemoto, Shogo ; Kuroda, Taihei ; Morimoto, Taiga ; Hayashi, Takuma ; Iijima, Toru ; Tokunaga, Tomoharu ; Ikeda, Naoshi ; Fujimori, Kazuhiro ; Itoh, Chihiro ; Nishikawa, Takeshi ; Yamashita, Yoshifumi ; Kiwa, Toshihiko ; Koshihara, Shin Ya ; Maeda, Satoshi ; Hayashi, Yasuhiko. / One-Minute Joule Annealing Enhances the Thermoelectric Properties of Carbon Nanotube Yarns via the Formation of Graphene at the Interface. In: ACS Applied Energy Materials. 2019.
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AU - Omoto, Kazuki

AU - Chujo, Daiki

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AU - Itoh, Chihiro

AU - Nishikawa, Takeshi

AU - Yamashita, Yoshifumi

AU - Kiwa, Toshihiko

AU - Koshihara, Shin Ya

AU - Maeda, Satoshi

AU - Hayashi, Yasuhiko

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