Electrochemical Thermoelectric Conversion with Polysulfide as Redox Species

Research output: Contribution to journalArticle

Abstract

Thermocells convert waste heat to electricity without any pollution; however, the high cost and corrosivity of redox species hinder their commercialization. In this work, a thermocell that utilizes abundant polysulfide as redox species was demonstrated for the first time. 1-Butyl-1-methylpyrrolidinium polysulfide [(P14)2S3] was synthesized, and the redox species were prepared by the addition of sulfur to the (P14)2S3 solution in DMSO. In thermoelectric measurements, the Seebeck coefficient changed from −0.68 to +0.5 mV K−1 through addition of sulfur to the cell. Operando UV/Vis spectroscopy and open-circuit voltage analysis revealed that this effect was attributed to the change in the dominating redox reactions by the addition of sulfur. This result also provides a thermodynamic view on polysulfides electrochemistry, which is of high importance for lithium–sulfur batteries.

Original languageEnglish
Pages (from-to)4014-4020
Number of pages7
JournalChemSusChem
Volume12
Issue number17
DOIs
Publication statusPublished - Sep 6 2019

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Polysulfides
Sulfur
sulfur
electrochemistry
Seebeck coefficient
Redox reactions
Waste heat
commercialization
Electrochemistry
Open circuit voltage
Dimethyl Sulfoxide
Ultraviolet spectroscopy
electricity
Pollution
Electricity
thermodynamics
spectroscopy
Thermodynamics
pollution
cost

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Cite this

Electrochemical Thermoelectric Conversion with Polysulfide as Redox Species. / Liang, Yimin; Hui, Joseph K.H.; Yamada, Teppei; Kimizuka, Nobuo.

In: ChemSusChem, Vol. 12, No. 17, 06.09.2019, p. 4014-4020.

Research output: Contribution to journalArticle

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