Electricity Generation Characteristics of Urea/Sodium Persulfate Paper-based Microfluidic Fuel Cells
In this paper,a completely passive paper-based microfluidic fuel cell using urea/sodium persulfate is proposed.Non-noble metal nickel catalysts are electrodeposited on carbon paper by square-wave current method to prepare the anode.The cathode requires no catalyst and the fuel cell cost is greatly reduced.The cell performance is tested under different structures and concen-trations of fuel,oxidant and electrolyte.The results show that the double-layer paper structure can greatly improve the flow rate of reactants,strengthen the mass transfer of reactants,and improve the performance.When the electrode spacing is 6 mm,the fuel concentration is 0.3 mol·L-1,and the oxidant and electrolyte concentrations are 1.0 mol·L-1,the peak power density and limit current density of the fuel cell are 5.9 mW·cm-2 and 23.5 mA·cm-2,respectively.Moreover,good operation stability is also achieved.