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 language | English |
|---|---|
| Pages (from-to) | 1696-1705 |
| Number of pages | 10 |
| Journal | Energy and Environmental Science |
| Volume | 9 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2016 May |
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All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Pollution
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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 journal › Article
TY - JOUR
T1 - Chemically exfoliated transition metal dichalcogenide nanosheet-based wearable thermoelectric generators
AU - Oh, Jin Young
AU - Lee, Ji Hoon
AU - Han, Sun Woong
AU - Chae, Soo Sang
AU - Bae, Eun Jin
AU - Kang, Young Hun
AU - Choi, Won Jin
AU - Cho, Song Yun
AU - Lee, Jeong O.
AU - Baik, Hong Koo
AU - Lee, Tae Il
PY - 2016/5
Y1 - 2016/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84971003277&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84971003277&partnerID=8YFLogxK
U2 - 10.1039/c5ee03813h
DO - 10.1039/c5ee03813h
M3 - Article
AN - SCOPUS:84971003277
VL - 9
SP - 1696
EP - 1705
JO - Energy and Environmental Science
JF - Energy and Environmental Science
SN - 1754-5692
IS - 5
ER -