Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 43, Issue 7, Pages 2583-2591Publisher
WILEY
DOI: 10.1002/er.4176
Keywords
direct ethylene glycol fuel cell; fuel cells; hydrogen peroxide; operation parameters; power density
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Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [25211817]
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In this work, a hybrid fuel cell is developed and tested, which is composed of an alkaline anode, an acid cathode, and a cation exchange membrane. In this fuel cell, ethylene glycol and hydrogen peroxide serve as fuel and oxidant, respectively. Theoretically, this fuel cell exhibits a theoretical voltage reaching 2.47 V, whereas it is experimentally demonstrated that the hybrid fuel cell delivers an open-circuit voltage of 1.41 V at 60 degrees C. More impressively, this fuel cell yields a peak power density of 80.9 mW cm(-2) (115.3 mW cm(-2) at 80 degrees C). Comparing to an open-circuit voltage of 0.86 V and a peak power density of 67 mW cm(-2) previously achieved by a direct ethylene glycol fuel cell operating with oxygen, this hybrid direct ethylene glycol fuel cell boosts the open-circuit voltage by 62.1% and the peak power density by 20.8%. This significant improvement is mainly attributed not only to the high-voltage output of this hybrid system design but also to the faster kinetics rendered by the reduction reaction of hydrogen peroxide.
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