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- W2566089794 abstract "This paper presents a new system strategy designed to alleviate the performance decay caused by start-up/shut-down (SU/SD) conditions in proton exchange membrane fuel cells (PEMFCs). The innovative method was tested using a two-phase dummy load composed of a linearly declined main load and a fixed small auxiliary load. The initial value of the main load must be controlled within a proper range, and a closed-ended air exhaust is necessary. According to the analysis of in-situ current density distribution during SD processes, the two-phase dummy load can continuously fit the process of oxygen reduction in the cathode, whereas the conventional dummy load leads to local air starvation. Polarization curves and cyclic voltammetry (CV) were employed to evaluate the performance decay during SU/SD repetition. After tests of 900 cycles, the highest voltage degradation rate of the PEMFC was 3.33 μV cycle−1 (800 mA cm−2), and the electrochemical surface area (ECSA) loss was 0.0046 m2 g−1 cycle−1 with the two-phase dummy load strategy. After comparing results with similar work on a single PEMFC, the authors confirmed the preeminent effectiveness of this strategy. This strategy will also improve fuel cell stack performance due to controllable SD duration and comparatively low performance decay rates." @default.
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- W2566089794 date "2017-02-01" @default.
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- W2566089794 title "Study of the two-phase dummy load shut-down strategy for proton exchange membrane fuel cells" @default.
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- W2566089794 doi "https://doi.org/10.1016/j.jpowsour.2016.11.098" @default.
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