Real-Time Imaging of Liquid Water in an Operating Proton Exchange Membrane Fuel Cell
Open Access
- 1 January 2006
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 153 (5), A902-A908
- https://doi.org/10.1149/1.2184893
Abstract
Neutron imaging experiments were carried out to measure the water content of an operating proton exchange membrane fuel cell (PEMFC) under varying conditions of current density and temperature. It was found that the water content of the PEMFC is strongly coupled to the current density and temperature of the cell. These measurements indicate that changes in water content lag changes in current density by at least 100s100s , both when the current density was increased and decreased. Less liquid water was measured in the cells when operating at 80°C80°C than at 40°C40°C . At 60°C60°C cell temperature, a peak in water content was observed around 650mA∕cm2650mA∕cm2 and the water content was found to decrease with increasing current density. This is explained in the context of cell heating by performing a simple thermal analysis of an operating PEMFC so as to yield quantitative information on the waste heat and its effects on the liquid water contained in the cell.Keywords
This publication has 15 references indexed in Scilit:
- In situ diagnostic of two-phase flow phenomena in polymer electrolyte fuel cells by neutron imagingElectrochimica Acta, 2005
- Analysis of a Two-Phase Non-Isothermal Model for a PEFCJournal of the Electrochemical Society, 2005
- In situ neutron imaging technique for evaluation of water management systems in operating PEM fuel cellsJournal of Power Sources, 2004
- Visualization of Liquid Water Transport in a PEFCElectrochemical and Solid-State Letters, 2004
- Visualization of water buildup in the cathode of a transparent PEM fuel cellJournal of Power Sources, 2003
- In Situ Current Distribution Measurements in Polymer Electrolyte Fuel CellsJournal of the Electrochemical Society, 2003
- Rigorous 3-D Mathematical Modeling of PEM Fuel CellsJournal of the Electrochemical Society, 2003
- In Situ Investigation of Two‐Phase Flow Patterns in Flow Fields of PEFC’s Using Neutron RadiographyFuel Cells, 2002
- Neutron Imaging Technique for In Situ Measurement of Water Transport Gradients within Nafion in Polymer Electrolyte Fuel CellsJournal of the Electrochemical Society, 1999
- Low platinum loading electrodes for polymer electrolyte fuel cells fabricated using thermoplastic ionomersElectrochimica Acta, 1995