Novel options and limitations of methanol-based production and storage for mobile applications

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Authors

Poetzsch, D.
Bach, T.
Zerpa Unda, J.E.
Roduner, Emil

Journal Title

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Volume Title

Publisher

Wiley

Abstract

Methanol is considered a promising liquid fuel in context with electrochemical energy conversion and storage for mobile applications. It is shown here that a direct methanol fuel cell can be used for spontaneous charging and discharging a supercapacitor (SC) for intermediate storage of chemical energy. Thereby, protons and electrons of the methanol- derived hydrogen are stored separately in the electrical double layer of the SC electrode. The charging and discharging of this fuel cell–SC hybride device is investigated in experiments of spontaneous conditions (closed circuit) and also under externally enforced constant voltage sweep rate (cyclic voltammetry) and under constant current conditions. Alternatively, gas phase hydrogen is generated from methanol in an electro-reforming process. When more efficient anode electrocatalysts become available this may become the method of choice for on-board and on demand hydrogen production in mobile applications.

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Keywords

Charging of porous electrode, DMFC-supercapacitor hybrid device, Electrochemical hydrogen storage, Methanol electro-reforming

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Citation

Poetzsch, D, Bach, T, Zerpa, Unda, JE & Roduner, E 2014, 'Novel options and limitations of methanol-based production and storage for mobile applications', Fuel Cells, vol. 14, no. 3, pp. 508-516.