In situ PEM fuel cell water measurements [electronic resource].
- Washington, D.C. : United States. Dept. of Energy ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2009
- Physical description
- 1 online resource.
- Los Alamos National Laboratory. Researcher
- United States. Dept. of Energy. Sponsor
- United States. Dept. of Energy. Office of Scientific and Technical Information. Distributor
- Borup, Rodney L Author
- Davey, John R Author
- Mukundan, Rangachary Author
- Hussey, Daniel S Author
- Jacobson, David L Author
- Arif, Muhammad Author
- Spendelow, Jacob S Author
- Efficient PEM (Polymer Electrolyte Membrane) fuel cell performance requires effective water management. To achieve a deeper understanding of water transport and performance issues associated with water management, we have conducted in situ water examinations to help understand the effects of components and operations. High Frequency Resistance (HFR), AC Impedance and Neutron imaging were used to measure water content in operating fuel cells, with various conditions, including current density, relative humidity, inlet flows, flow orientation and variable Gas Diffusion Layer (GDL) properties. High resolution neutron radiography was used to image fuel cells during a variety of conditions. The effect of specific operating conditions, including flow direction (co-flow or counter-flow) was examined. Counter-flow operation was found to result in higher water content than co-flow operation, which correlates to lower membrane resistivity. A variety of cells were used to quantify the membrane water in situ during exposure to saturated gases, during fuel cell operation, and during hydrogen pump operation. The quantitative results show lower membrane water content than previous results suggested.
- Publication date
- Published through SciTech Connect.
- " la-ur-09-186"
- 2008 Fuel Cell Seminar & Exposition ; October 27, 2008 ; Phoenix, AZ.
- Borup, Rodney L; Davey, John R; Mukundan, Rangachary; Hussey, Daniel S; Jacobson, David L; Arif, Muhammad; Spendelow, Jacob S.
- Funding information