کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11020222 1717601 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of flow field geometry on operating current density, capacity and performance of vanadium redox flow battery
ترجمه فارسی عنوان
اثر هندسه جریان جریان بر تراکم جریان عملیاتی، ظرفیت و عملکرد باطری جریان ووادادی رادیواکتیو
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
Addition of flow fields to carbon paper electrodes in a vanadium redox flow battery (VRFB) can improve the peak power density through uniform distribution of electrolyte in the electrodes. However, it is unclear whether flow fields have a similar effect with graphite felt electrodes, as VRFBs with felt electrodes reported in literature show a large anomaly in obtained power density. In this work, we evaluate three flow fields; viz. serpentine, interdigitated and conventional (without flow pattern) type with felt electrodes and compare their performance with a serpentine flow field using carbon paper electrodes under identical experimental conditions. The conventional flow field provides highest energy efficiency (75%) followed by serpentine (64%) and interdigitated (55%) at 0.2 A cm−2 attributable to the deteriorating electrolyte distribution in the electrodes. Computation fluid dynamic simulations confirm the experimental finding of worsening electrolyte distribution (conventional < serpentine < interdigitated). A power density of 0.51 W cm−2 at 60 mL min−1 flow rate is obtained for serpentine and conventional flow fields with felt electrodes; comparable to the highest power density reported in literature for high performing zero-gap flow field architecture. This paper gives comprehensive insights on flow fields for VRFBs that can be extended to other flow batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 404, 15 November 2018, Pages 20-27
نویسندگان
, , , , ,