Ethanol based fuel cell on paper support

Chandra, Subrata and Lal, Sweta and Janardhanan, V and Sahu, Kirti Chandra and M, Deepa (2018) Ethanol based fuel cell on paper support. Journal of Power Sources, 396. pp. 725-733. ISSN 0378-7753

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Abstract

Easily disposable low cost fuel cells as power sources are environmentally benign alternates to batteries for powering micro-analytical systems. In this regard, for the first time, an ethanol-dichromate fuel-oxidant microfluidic fuel cell is implemented on a paper scaffold. In this cell, a proton conducting poly (4-styrenesulfonate) based gel electrolyte enables proton transport from the anode to the cathode. Hydrothermally synthesized molybdenum oxide nanorods catalyze dichromate reduction and ethanol oxidation at the respective electrodes. A peak power density of 6.32 mWcm−2 is achieved with the catalyst. However, the cell without catalyst delivers a maximum power density of only 2.74 mWcm−2. The compositions of the catholyte and anolyte streams and molybdenum oxide loadings are optimized. A stack of two cells connected in series illuminates a 3 mm red light emitting diode for over 40 min. This real time demonstration showcases the potential of this cell as an alternative to batteries for powering micro-analytical devices.

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