- A methanol microfluidic fuel cell with vapor feed anode and air-breathing cathode is demonstrated.
- Advantages of this fuel cell, compared with conventional liquid feed microfluidic fuel cells, include simpler cell structure and fluid management, direct usage of neat methanol, higher system energy density, better cell performance, and improved fuel and energy efficiency.
- Benefiting from the alleviated fuel crossover effect on cathode and the eliminated fuel depletion boundary layer on anode, a peak power density of 55.4 mWcm−2 under room temperature is achieved.
- The energy efficiency reached is 9.4% which is 28 times higher than its liquid feed counterpart.
Yifei Wang1, Dennis Y.C. Leung1, Jin Xuan1,2,3, Huizhi Wang1,3Show Affiliations
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
- State-Key Laboratory of Chemical Engineering, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
- School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
In this paper, a prototype of methanol microfluidic fuel cell with vapor feed anode configuration is proposed to improve the fuel and energy efficiency of the conventional liquid feed methanol microfluidic fuel cells. Peak power density of 55.4 mW cm−2 can be achieved with this prototype under room temperature, which is 30% higher than its conventional liquid feed counterpart. Moreover, an energy efficiency of 9.4% is achieved, which is 27.5 times higher than its liquid feed counterpart. This superiority on both cell performance and energy efficiency is directly benefited from its vapor feed anode configuration, which alleviates the fuel crossover, eliminates the fuel depletion boundary layer, and avoids the bulk anolyte wastage. The tradeoff between cell performance and fuel utilization for conventional liquid feed microfluidic fuel cells is also evaded.Go To Applied Energy