“…In a recent work we have named it membraneless micro fuel cell, because the major characteristics include lack of a polymer membrane and microfabricated components. The lack of a polymer membrane allows the LFFC to use a large variety of fuels [256] including hydrogen [247,253] , methanol [246,248,251,255] , ethanol [260] , formic acid [131,264,265] , sodium borohydride, hydrazine [250,260] and glucose [270] . Table 4 lists various examples of LFFCs with different fuels, electrolytes (acid or basic medium) and the generated power densities.…”