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- W4285398601 abstract "Polymer electrolyte membrane fuel cells (PEMFCs) are promising alternative to internal combustion engines, owing to their capability to produce on-demand power with zero local carbon emissions. However, PEMFCs suffer from limitations related to performance, particularly for heavy-duty vehicle applications [1]. A major contributor to the performance loss is the cathode electrode; uncontrolled conventional electrode structures lead to non-ideal transport pathways of O 2 and H + [2], subsequently leading to performance loss. Here, we report an alternative electrode structure termed groovy electrodes, fabricated via patterned Si templates. Si templates with desired patterns are fabricated through photolithography and deep-reactive ion etching techniques (Fig. 1a), and an electrode layer is coated onto the template and subsequently transferred to the membrane or the gas diffusion layer. The resulting electrode features ordered grooves with consistent depth and width (Fig. 1b-c). We will present how this alternative structure enables improved H + transport (enabled by higher ionomer content) with grooves facilitating effective O 2 transport to reaction sites. We will also demonstrate the benefits of a groovy electrode for the durability of PEMFCs. Reference Cullen et al., Nat. Energy , 6 , 462 (2021). Ramaswamy et al., J. Electrochem. Soc. , 167 , 064515 (2020). Figure 1" @default.
- W4285398601 created "2022-07-14" @default.
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- W4285398601 date "2022-07-07" @default.
- W4285398601 modified "2023-09-26" @default.
- W4285398601 title "Groovy Electrodes Enable Facile O<sub>2</sub> and H<sup>+</sup> Transport in PEMFCs" @default.
- W4285398601 doi "https://doi.org/10.1149/ma2022-01351420mtgabs" @default.
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