کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5149743 | 1497891 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving the electrochemical behavior of lithium-sulfur batteries through silica-coated nickel-foam cathode collector
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A facile method that improves the initial specific capacity and capacity retention rate of lithium-sulfur (Li-S) batteries, using silica-back-coated nickel foam has been studied. A new cathode collector in which silica is back-coated onto the nickel foam is fabricated by a facile method that utilizes an ultrasonicator for reducing the electrolyte viscosity at the surface of the sulfur electrode using a polysulfide absorbent. The nickel foam provides more reaction sites than an aluminum current collector does, thus allowing the back-coated silica to absorb the polysulfides. This synergetic effect of nickel foam and silica suppresses the increasing viscosity of the electrolyte and leads to a higher initial specific capacity (1341Â mAh/g) at a 0.2-C rate and a higher capacity retention rate after 150 cycles (85%), relative to pristine Li-S batteries (951Â mAh/g and 79%, respectively).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 341, 15 February 2017, Pages 366-372
Journal: Journal of Power Sources - Volume 341, 15 February 2017, Pages 366-372
نویسندگان
Sung Ho Cho, Sung Man Cho, Ki Yoon Bae, Byung Hyuk Kim, Woo Young Yoon,