Abstract
Thermo-electrochemical cells have potential to generate thermoelectric voltage 1 order higher than that given by semiconductor materials. To overcome the current issues in thermoelectric energy conversion, it is of paramount importance to grow and fulfill the full potential of thermo-electrochemical cells. Here we report a rational supramolecular methodology that yielded the highest Seebeck coefficient of ca. 2.0 mV K-1 around ambient temperatures. This is based on the encapsulation of triiodide ions in α-cyclodextrin, whose equilibrium is shifted to the complexation at lower temperatures, whereas it is inverted at elevated temperatures. This temperature-dependent host-guest interaction provides a concentration gradient of redox ion pairs between two electrodes, leading to the eminent performance of the thermo-electrochemical cells. The figure of merit for this system, zT reached a high value of 5 × 10-3. The introduction of host-guest chemistry to thermoelectric cells thus provides a new perspective in thermoelectric energy conversion.
| Original language | English |
|---|---|
| Pages (from-to) | 10502-10507 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 138 |
| Issue number | 33 |
| DOIs | |
| Publication status | Published - Aug 24 2016 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Supramolecular Thermo-Electrochemical Cells : Enhanced Thermoelectric Performance by Host-Guest Complexation and Salt-Induced Crystallization. / Zhou, Hongyao; Yamada, Teppei; Kimizuka, Nobuo.
In: Journal of the American Chemical Society, Vol. 138, No. 33, 24.08.2016, p. 10502-10507.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Supramolecular Thermo-Electrochemical Cells
T2 - Enhanced Thermoelectric Performance by Host-Guest Complexation and Salt-Induced Crystallization
AU - Zhou, Hongyao
AU - Yamada, Teppei
AU - Kimizuka, Nobuo
PY - 2016/8/24
Y1 - 2016/8/24
N2 - Thermo-electrochemical cells have potential to generate thermoelectric voltage 1 order higher than that given by semiconductor materials. To overcome the current issues in thermoelectric energy conversion, it is of paramount importance to grow and fulfill the full potential of thermo-electrochemical cells. Here we report a rational supramolecular methodology that yielded the highest Seebeck coefficient of ca. 2.0 mV K-1 around ambient temperatures. This is based on the encapsulation of triiodide ions in α-cyclodextrin, whose equilibrium is shifted to the complexation at lower temperatures, whereas it is inverted at elevated temperatures. This temperature-dependent host-guest interaction provides a concentration gradient of redox ion pairs between two electrodes, leading to the eminent performance of the thermo-electrochemical cells. The figure of merit for this system, zT reached a high value of 5 × 10-3. The introduction of host-guest chemistry to thermoelectric cells thus provides a new perspective in thermoelectric energy conversion.
AB - Thermo-electrochemical cells have potential to generate thermoelectric voltage 1 order higher than that given by semiconductor materials. To overcome the current issues in thermoelectric energy conversion, it is of paramount importance to grow and fulfill the full potential of thermo-electrochemical cells. Here we report a rational supramolecular methodology that yielded the highest Seebeck coefficient of ca. 2.0 mV K-1 around ambient temperatures. This is based on the encapsulation of triiodide ions in α-cyclodextrin, whose equilibrium is shifted to the complexation at lower temperatures, whereas it is inverted at elevated temperatures. This temperature-dependent host-guest interaction provides a concentration gradient of redox ion pairs between two electrodes, leading to the eminent performance of the thermo-electrochemical cells. The figure of merit for this system, zT reached a high value of 5 × 10-3. The introduction of host-guest chemistry to thermoelectric cells thus provides a new perspective in thermoelectric energy conversion.
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U2 - 10.1021/jacs.6b04923
DO - 10.1021/jacs.6b04923
M3 - Article
VL - 138
SP - 10502
EP - 10507
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 33
ER -