کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7725443 | 1497848 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved electrolyte for zinc-bromine flow batteries
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کلمات کلیدی
باتری جریان روی بروم، دندریت روی، تراکم قدرت، ذخیره انرژی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Conventional zinc bromide electrolytes offer low ionic conductivity and often trigger severe zinc dendrite growth in zinc-bromine flow batteries. Here we report an improved electrolyte modified with methanesulfonic acid, which not only improves the electrolyte conductivity but also ameliorates zinc dendrite. Experimental results also reveal that the kinetics and reversibility of Zn2+/Zn and Br2/Brâ are improved in this modified electrolyte. Moreover, the battery's internal resistance is significantly reduced from 4.9 to 2.0â¯Î©â¯cm2 after adding 1â¯M methanesulfonic acid, thus leading to an improved energy efficiency from 64% to 75% at a current density of 40â¯mAâ¯cmâ2. More impressively, the battery is capable of delivering an energy efficiency of about 78% at a current density of as high as 80â¯mAâ¯cmâ2 when the electrode is replaced by a thermally treated one. Additionally, zinc dendrite growth is found to be effectively suppressed in methanesulfonic acid supported media, which, as a result, enables the battery to be operated for 50 cycles without degradation, whereas the one without methanesulfonic acid suffers from significant decay after only 40 cycles, primarily due to severe zinc dendrite growth. These superior results indicate methanesulfonic acid is a promising supporting electrolyte for zinc-bromine flow batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 384, 30 April 2018, Pages 232-239
Journal: Journal of Power Sources - Volume 384, 30 April 2018, Pages 232-239
نویسندگان
M.C. Wu, T.S. Zhao, L. Wei, H.R. Jiang, R.H. Zhang,