Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I3-/hydrophobized α-cyclodextrin complexes on electrodes

Hirotaka Inoue; Yimin Liang; Teppei Yamada; Nobuo Kimizuka

doi:10.1039/d0cc02356f

Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I₃^-/hydrophobized α-cyclodextrin complexes on electrodes

Hirotaka Inoue, Yimin Liang, Teppei Yamada, Nobuo Kimizuka

Applied Chemistry

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Ethylated α-cyclodextrin (Et18-α-CD) is used as a host matrix for I-/I3- thermocells. Although Et18-α-CD is not soluble in water at ambient temperature, it becomes soluble by complexation of the I3- anion. Meanwhile, the complex is precipitated upon elevating the temperature. The change in thermo-responsive solubility of the I3-/Et18-α-CD complex increases the Seebeck coefficient (Se) of the thermocell up to 2.6 mV K-1. The underlying mechanism of the increased Se is elucidated by UV-vis spectroscopy, Raman spectroscopy, and electrochemical measurements. This result shows the temperature-dependent solubility changes of redox-active species as a potential means to improve the performance of electrochemical thermocells. This journal is

Original language	English
Pages (from-to)	7013-7016
Number of pages	4
Journal	Chemical Communications
Volume	56
Issue number	51
DOIs	https://doi.org/10.1039/d0cc02356f
Publication status	Published - Jun 28 2020

All Science Journal Classification (ASJC) codes

Catalysis
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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title = "Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I3-/hydrophobized α-cyclodextrin complexes on electrodes",

abstract = "Ethylated α-cyclodextrin (Et18-α-CD) is used as a host matrix for I-/I3- thermocells. Although Et18-α-CD is not soluble in water at ambient temperature, it becomes soluble by complexation of the I3- anion. Meanwhile, the complex is precipitated upon elevating the temperature. The change in thermo-responsive solubility of the I3-/Et18-α-CD complex increases the Seebeck coefficient (Se) of the thermocell up to 2.6 mV K-1. The underlying mechanism of the increased Se is elucidated by UV-vis spectroscopy, Raman spectroscopy, and electrochemical measurements. This result shows the temperature-dependent solubility changes of redox-active species as a potential means to improve the performance of electrochemical thermocells. This journal is ",

author = "Hirotaka Inoue and Yimin Liang and Teppei Yamada and Nobuo Kimizuka",

note = "Funding Information: This work was partly supported by JST PRESTO Grant Number JPMJPR141D, and JSPS KAKENHI Grant Numbers JP25220805, JP17H03046, JP19H05061 (Hydrogenomics), and JP16H06513 (Coordination Asymmetry). The authors would like to show our appreciation for the financial support from the Ogasawara Foundation for the Promotion of Science & Engineering, {\textquoteleft}{\textquoteleft}Innovation inspired by Nature{\textquoteright}{\textquoteright} Research Support Program, SEKISUI CHEMICAL CO. LTD and the Thermal & Electric Energy Technology Foundation. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

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doi = "10.1039/d0cc02356f",

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T1 - Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I3-/hydrophobized α-cyclodextrin complexes on electrodes

AU - Inoue, Hirotaka

AU - Liang, Yimin

AU - Yamada, Teppei

AU - Kimizuka, Nobuo

N1 - Funding Information: This work was partly supported by JST PRESTO Grant Number JPMJPR141D, and JSPS KAKENHI Grant Numbers JP25220805, JP17H03046, JP19H05061 (Hydrogenomics), and JP16H06513 (Coordination Asymmetry). The authors would like to show our appreciation for the financial support from the Ogasawara Foundation for the Promotion of Science & Engineering, ‘‘Innovation inspired by Nature’’ Research Support Program, SEKISUI CHEMICAL CO. LTD and the Thermal & Electric Energy Technology Foundation. Publisher Copyright: © The Royal Society of Chemistry.

PY - 2020/6/28

Y1 - 2020/6/28

N2 - Ethylated α-cyclodextrin (Et18-α-CD) is used as a host matrix for I-/I3- thermocells. Although Et18-α-CD is not soluble in water at ambient temperature, it becomes soluble by complexation of the I3- anion. Meanwhile, the complex is precipitated upon elevating the temperature. The change in thermo-responsive solubility of the I3-/Et18-α-CD complex increases the Seebeck coefficient (Se) of the thermocell up to 2.6 mV K-1. The underlying mechanism of the increased Se is elucidated by UV-vis spectroscopy, Raman spectroscopy, and electrochemical measurements. This result shows the temperature-dependent solubility changes of redox-active species as a potential means to improve the performance of electrochemical thermocells. This journal is

AB - Ethylated α-cyclodextrin (Et18-α-CD) is used as a host matrix for I-/I3- thermocells. Although Et18-α-CD is not soluble in water at ambient temperature, it becomes soluble by complexation of the I3- anion. Meanwhile, the complex is precipitated upon elevating the temperature. The change in thermo-responsive solubility of the I3-/Et18-α-CD complex increases the Seebeck coefficient (Se) of the thermocell up to 2.6 mV K-1. The underlying mechanism of the increased Se is elucidated by UV-vis spectroscopy, Raman spectroscopy, and electrochemical measurements. This result shows the temperature-dependent solubility changes of redox-active species as a potential means to improve the performance of electrochemical thermocells. This journal is

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Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I₃^-/hydrophobized α-cyclodextrin complexes on electrodes

Abstract

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