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Operating Method to Maximize Life Time of 5 kW High Temperature Polymer Exchange Membrane Fuel Cell Stack
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 Title & Authors
Operating Method to Maximize Life Time of 5 kW High Temperature Polymer Exchange Membrane Fuel Cell Stack
KIM, JIHUN; KIM, MINJIN; SOHN, YOUNG-JUN; YU, SANGSEOK;
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 Abstract
HT-PEMFC (high temperature polymer electrolyte membrane fuel cell) using PA (phosphoric acid) doped PBI (polybenzimidazole) membrane has been researched for extending the lifetime. However, the existing work on durability of HT-PEMFC focuses on identifying degradation causes of lab scale. The short life time of HT-PEMFC is still the problem for its commercialization. In this paper, an operating method to maximize life time of 5kW HT-PEMFC stack are proposed. The proposed method includes major steps such as minimization of OCV (Open Circuit Voltage) exposure, control of the proper stack temperature, and N2 purging for the stack. This long life operating method was based on the fragmentary results of degradation from previous research works. Experimentally, the 5 kW homemade HT-PEMFC stack was operated for a long time based on the proposed method and the stack successfully can operate within the desired degradation rate for the target life time.
 Keywords
HT-PEMFC;Durability;Operating condition;OCV;Phosphoric Acid;Degradation;
 Language
Korean
 Cited by
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