Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I3−/hydrophobized α-cyclodextrin complexes on electrodes. Issue 51 (22nd May 2020)

• Record Type: Journal Article
• Authors: Inoue, Hirotaka; Liang, Yimin; Yamada, Teppei; Kimizuka, Nobuo
• Is Part Of: Chemical communications. Volume 56:Issue 51(2020)
• Page Start: 7013
• Page End: 7016
• Publication Date: 2020-05-22
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc02356f
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Ethylated α-cyclodextrin (Et18 -α-CD) is used as a host matrix for I − /I3 − thermocells. 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 ( S e ) of the thermocell up to 2.6 mV K −1 . The underlying mechanism of the increased S e 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.