Chemically exfoliated transition metal dichalcogenide nanosheet-based wearable thermoelectric generators

Jin Young Oh, Ji Hoon Lee, Sun Woong Han, Soo Sang Chae, Eun Jin Bae, Young Hun Kang, Won Jin Choi, Song Yun Cho, Jeong O. Lee, Hong Koo Baik, Tae Il Lee

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

To utilize human heat energy as a permanent power source, we demonstrate, for the first time, an intrinsically highly foldable and stretchable thermoelectric generator that is based upon chemically exfoliated 1T-transition metal dichalcogenide (TMDC) nanosheets (NSs) for self-powered wearable electronics. The power factors of WS2 (n-type) and NbSe2 (p-type) NS films were evaluated to be 5-7 μ K-2 m-1 and 26-34 μW K-2 m-1, respectively, near room temperature. With these films, parallel-connected thermoelectric generators that were fabricated were able to constantly produce up to 38 nW of output power at Δ60 K. The thermoelectric device stably sustained its performance, even after 100 bending cycles and after 100 stretching cycles (50% strain). By direct observation, we found that the film is highly stretched by partial tearing and folding but still maintains an electrical percolation pathway. The morphology then is quickly recovered by a plug-in contact between the torn parts as the external strain is released. Finally, we demonstrate the electric power generation from a prototype wearable thermoelectric generator that was woven into a wristband fitted on a real human body.

Original languageEnglish
Pages (from-to)1696-1705
Number of pages10
JournalEnergy and Environmental Science
Volume9
Issue number5
DOIs
Publication statusPublished - 2016 May

Fingerprint

Nanosheets
transition element
Transition metals
Electric power generation
power generation
Stretching
folding
energy
temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

Cite this

Oh, J. Y., Lee, J. H., Han, S. W., Chae, S. S., Bae, E. J., Kang, Y. H., ... Lee, T. I. (2016). Chemically exfoliated transition metal dichalcogenide nanosheet-based wearable thermoelectric generators. Energy and Environmental Science, 9(5), 1696-1705. https://doi.org/10.1039/c5ee03813h
Oh, Jin Young ; Lee, Ji Hoon ; Han, Sun Woong ; Chae, Soo Sang ; Bae, Eun Jin ; Kang, Young Hun ; Choi, Won Jin ; Cho, Song Yun ; Lee, Jeong O. ; Baik, Hong Koo ; Lee, Tae Il. / Chemically exfoliated transition metal dichalcogenide nanosheet-based wearable thermoelectric generators. In: Energy and Environmental Science. 2016 ; Vol. 9, No. 5. pp. 1696-1705.
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Oh, JY, Lee, JH, Han, SW, Chae, SS, Bae, EJ, Kang, YH, Choi, WJ, Cho, SY, Lee, JO, Baik, HK & Lee, TI 2016, 'Chemically exfoliated transition metal dichalcogenide nanosheet-based wearable thermoelectric generators', Energy and Environmental Science, vol. 9, no. 5, pp. 1696-1705. https://doi.org/10.1039/c5ee03813h

Chemically exfoliated transition metal dichalcogenide nanosheet-based wearable thermoelectric generators. / Oh, Jin Young; Lee, Ji Hoon; Han, Sun Woong; Chae, Soo Sang; Bae, Eun Jin; Kang, Young Hun; Choi, Won Jin; Cho, Song Yun; Lee, Jeong O.; Baik, Hong Koo; Lee, Tae Il.

In: Energy and Environmental Science, Vol. 9, No. 5, 05.2016, p. 1696-1705.

Research output: Contribution to journalArticle

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AU - Bae, Eun Jin

AU - Kang, Young Hun

AU - Choi, Won Jin

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AU - Lee, Jeong O.

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AU - Lee, Tae Il

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