Electrochemical Thermoelectric Conversion with Polysulfide as Redox Species.,ChemSusChem

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Electrochemical Thermoelectric Conversion with Polysulfide as Redox Species.
ChemSusChem ( IF 7.5 ) Pub Date : 2019-08-07 , DOI: 10.1002/cssc.201901566
Yimin Liang ₁ , Joseph K-H Hui ₁ , Teppei Yamada _{1,

2} , Nobuo Kimizuka _{1,

2}

Affiliation

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 )2 S3 ] was synthesized, and the redox species were prepared by the addition of sulfur to the (P14 )2 S3 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.

中文翻译：

用多硫化物作为氧化还原物质进行电化学热电转化。

热电池将废热转化为电能而没有任何污染；然而，氧化还原物质的高成本和腐蚀性阻碍了它们的商业化。在这项工作中，首次展示了利用丰富的多硫化物作为氧化还原物质的热电池。合成了1-丁基-1-甲基吡咯烷鎓多硫化物[（P14）2 S3]，通过向DMSO中的（P14）2 S3溶液中添加硫来制备氧化还原物质。在热电测量中，通过向池中添加硫，塞贝克系数从-0.68变为+0.5 mV K-1。Operando紫外/可见光谱和开路电压分析表明，这种影响归因于添加硫引起的主要氧化还原反应的变化。该结果还提供了有关多硫化物电化学的热力学观点，

更新日期：2019-08-07

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