Impedance Analysis of Three-Dimensional Continuous Carbon Filament Embroidered Electrodes in Large 300 cm<sup>2</sup> Redox Flow Cells
نویسندگان
چکیده
The paper investigates the use of three-dimensional (3D) continuous carbon filament electrodes prepared using tailored fiber placement (i.e. embroidered electrodes) in a 300 cm 2 redox flow cell with 50% state-of-charge (SOC) ferro/ferricyanide couple as probe electrolyte. Electrochemical impedance spectroscopy (EIS) was conducted to identify different resistance contributions, and thus voltage losses electrodes. findings indicate that: (1) achievingh high frequency values comparable felts is possible through side contacting graphite plates, eliminating need press entire electrode structure. (2) can minimize pressure drop, regardless thickness, due parallel orientation filaments electrolyte flow, resulting reduced hydraulic resistance. (3) To reduce charge-transfer resistances, an oxidation treatment required improve wettability electrodes, duration activation must be optimized avoid breakage etching. (4) Embroidered exhibit higher mass transfer coefficients thanfelts, which attributed perpendicular flow. provides avenues for further development 3D
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ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2023
ISSN: ['0013-4651', '1945-7111']
DOI: https://doi.org/10.1149/1945-7111/acd1d8