Effective selection and use of advanced membrane electrode power assemblies

PRIMEA(R) membrane electrode power assemblies have been available from W. L . Gore & Associates, Inc. (Gore) since 1995, when Gore introduced the 5000 series based on the GORE-SELECT(R) composite membranes. In order to provide the highest power density power assembly, a second generation PRIMEA(R) me mbrane electrode power assembly (series 5510) was introduced in 1997 Both s eries 5000 and 5510 power assemblies were designed for hydrogen/air applica tions. A third generation of PRIMEA(R) membrane electrode power assemblies is now available for operations with reformate fuel streams. All Gore MEAs have been made available with complementary components such as integral gas keting and gas diffusion media, to maximize product performance and durabil ity. In this publication, we explore the selection of MEA characteristics r equired in common applications. Performance data will be provided on a rang e of PRIMEA(R) power assemblies under conditions which should be relevant t o selection and design criteria typically encountered in fuel cell stack an d system development. In addition, examples of successful field demonstrati ons of PRIMEA(R) power assemblies will be shown in various applications, de monstrating the scope for sq system differentiation utilizing one family of MEA products. This paper is divided into Sour. sections; the first three e xploring specific requirements of portable, stationary, and transportation applications, and the fourth section discusses general product issues, such as quality assurance and manufacturing requirements, as well as ancillary components and associated technical support.