Investigation of the kinetic and mass transport limitations in thermoelectrochemical cells with different electrode materials

Physical Chemistry Chemical Physics : PCCP
Theodore J AbrahamJennifer M Pringle

Abstract

Thermoelectrochemical cells (TECs) have the potential to offer a continuous renewable electricity supply from a variety of thermal energy sources. Because of the thermal gradient, the device characteristics are a complex function of temperature dependent electrolyte transport properties, electrode electro-catalytic properties and the Seebeck coefficient of the redox couple. Understanding the interplay between these functions is critical to identifying the limiting factors that need to be overcome to produce more advanced devices. Thus, in this work we have developed a theoretical model for TECs and have measured a range of properties required by the model. We focused attention on the Co(n)(bpy)3(NTf2)n in a [C2mim][B(CN)4] ionic liquid electrolyte as one of the optimal systems for >100 °C operation. The exchange current densities on a range of electrode materials were measured in order to explore the role of electrode function in the simulation. Alternatives to platinum electrodes (maximum output power, Pmax = 183 mW m(-2)), including platinized stainless steel, Pt-SS (Pmax = 188 mW m(-2)) and poly(3,4-ethylenedioxythiophene) deposited on stainless steel, PEDOT-SS (Pmax = 179 mW m(-2)), were shown to be viable options. From the...Continue Reading

References

Aug 2, 2008·Science·Bjorn Winther-JensenDouglas R Macfarlane
May 6, 2011·Chemical Communications : Chem Comm·Theodore J AbrahamJennifer M Pringle
Sep 22, 2012·Nature·Kanishka BiswasMercouri G Kanatzidis

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Citations

Sep 9, 2015·Physical Chemistry Chemical Physics : PCCP·Manoj A LazarJennifer M Pringle
May 29, 2015·Magnetic Resonance in Chemistry : MRC·Raymond J AbrahamFernando Sancassan
May 24, 2017·Chemical Communications : Chem Comm·M F DupontJ M Pringle
Jan 9, 2018·Journal of Materials Chemistry. A, Materials for Energy and Sustainability·Kosala WijeratneXavier Crispin
Sep 6, 2018·Physical Chemistry Chemical Physics : PCCP·Kyunggu Kim, Hochun Lee
Dec 6, 2018·Nature Communications·Jiangjiang DuanJun Zhou
Jul 23, 2019·ACS Applied Materials & Interfaces·Ju Hyeon Kim, Tae June Kang

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