Performance characteristics of a novel tubular-shaped passive direct methanol fuel cell

► The tubular DMFC represented an 870% improvement in power from the previous best, passive, tubular DMFC. ► The peak power density of the tubular DMFC was higher than that of the planar DMFC for both the Nafion® 212 and 115 MEAs operated with 1 M, 2 M, and 3 M methanol solutions. ► The tubular DMFC produced equal fuel and energy efficiencies to those of the planar DMFC during 1 M methanol operation ► The tubular DMFC experienced higher methanol crossover than the planar DMFC potentially due to an increased static fluid pressure in the anode fuel reservoir (AFR) caused by the cell orientation and geometry.