Characterisation of a portable DMFC stack and a methanol-feeding concept

An active micro-direct methanol fuel cell with self-circulation of fuel and built-in removal of CO2 bubbles

“…At the same time, an array of technologies has been explored to passively deliver methanol fuel to the anodic reaction chamber. Diffusion through porous media [14][15][16] and surface tension-induced transportation [17] present promising solutions to mix pure methanol with water and supply the mixture to the reaction chamber. However, it is difficult to achieve sufficient agitation and in situ control of fuel concentration at the reaction chamber by passive fuel delivery means.…”

Methanol/air fuel cells: catalytic aspects and experimental diagnostics

“…For example, at 0.1 A increases of 0.2 V have been measured. This behavior is attributed to different effects of the temperature, such as higher mass transfer rate, higher reaction rates in the electrode reactions and a lower cell internal ohmic resistance [21]. At low temperatures cathode flooding may occur because water evaporation rate is insufficient to ensure a rapid removal from the pores.…”

A Pumpless Methanol Feeding Method for Application in Direct Methanol Fuel Cell Systems

“…Similarly, Arias et al [9] have reported a fuel cartridge comprising a fuel reservoir, and the fuel could be dispensed into the fuel cell by a mechanical force, by compressed air, by diffusion or by a capillary action. Oedegaard and Hentschel [10] have proposed a passive methanol supply system with a permeable tube placed in a fuel container. The methanol could diffuse through the tube walls into the anode fuel loop.…”