A Nanoporous Silicon Membrane Electrode Assembly for On-Chip Micro Fuel Cell Applications

Autor:	Mark A. Shannon, Chang Lu, Vaidyanathan Subramanian, Richard I. Masel, Scott Alan Gold, Kuan-Lun Chu
Rok vydání:	2006
Předmět:	Materials science Silicon Mechanical Engineering Membrane electrode assembly Proton exchange membrane fuel cell chemistry.chemical_element Nanotechnology Porous silicon chemistry Electrode Wafer Electrical and Electronic Engineering Microfabrication Power density
Zdroj:	Journal of Microelectromechanical Systems. 15:671-677
ISSN:	1057-7157
DOI:	10.1109/jmems.2006.872223
Popis:	Silicon-based fuel cells are under active development for chip-scale electrical power supply. One of the greatest challenges in micro-fuel-cell research is the development of a suitable proton conducting membrane material that is compatible with standard silicon microfabrication technology. In this paper, the use of nanoporous silicon as a novel proton conducting membrane material in a microscale fuel cell membrane electrode assembly (MEA) is demonstrated. The devices were fabricated by first creating 100-/spl mu/m-thick silicon windows in a standard silicon wafer, anodizing to create pores in the windows, and then painting catalyst layers and insulators onto the porous structures. Using 5 M formic acid and 0.5 M sulfuric acid as the fuel, the fuel cell peak power density reached about 30 mW/cm/sup 2/ at current density level of about 120 mA/cm/sup 2/. These results represent the successful integration of a new class of protonic conductor into a microfabricated silicon fuel cell.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::396b6bce15088fd33af4f31592093ad8 https://doi.org/10.1109/jmems.2006.872223 Zobrazit plný text záznamu