Small Direct Methanol Fuel Cell Pack for Portable Applications

Abstract
A small direct methanol fuel cell (DMFC) pack with a series connection of eight cells for portable applications was designed and fabricated. The maximum output power achieved with a 10% methanol fuel and air breathing was 2 W. This DMFC pack was tested as the electrical power source of a portable phone. Using a buffer capacitor greatly reduced the voltage change during talktime to 0.2 V, making it possible to make calls by using the phone with the DMFC pack.