کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6688833 | 501890 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel high-energy-density positive electrolyte with multiple redox couples for redox flow batteries
ترجمه فارسی عنوان
یک الکترولیت مثبت با انرژی با انرژی بالا با چندین زوج ردوکس برای باتری های ریودکس
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Low energy density resulting from the limited solubility of conventional electroactive species in electrolyte solutions has been one of the most critical barriers in the viability of redox flow batteries. Here we report a novel positive electrolyte that consists of two redox couples, viz. Fe3+/Fe2+ and Br2/Brâ. It is shown that both the capacity and energy density of this positive electrolyte are, respectively, as high as 804 Ah Lâ1 and 827 Wh Lâ1. Salient findings from the electrochemical characterizations of the electrolyte are as follows: (i) the two redox couples are reversible on the graphite electrode, in particular the presence of Brâ further improves the reversibility of Fe3+/Fe2+; (ii) the anodic peak current in the cyclic voltammetry increases linearly with the concentration of Fe2+ and Brâ, indicating that the oxidation of these ions follows a first-order reaction; (iii) the diffusion coefficients of Brâ and Fe2+ are 14.16 Ã 10â6 and 3.11 Ã 10â6 cm2 sâ1, respectively; and (iv) the reversibility and mass transfer of the reactive species improves with an increase in temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 136, 31 December 2014, Pages 576-581
Journal: Applied Energy - Volume 136, 31 December 2014, Pages 576-581
نویسندگان
Maochun Wu, Mingyao Liu, Guifa Long, Kai Wan, Zhenxing Liang, Tim S. Zhao,