کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760519 | 1498050 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved electrochemical performance of Li-doped natural graphite anode for lithium secondary batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Lithium-doped natural graphite is synthesized by a simple wet ball-milling method and use as an anode material in lithium secondary batteries. The modified natural graphite is examined with a view to improved cycleability and columbic efficiency on the first charge-discharge cycle (irreversible capacity loss). Lithium-doping results in marked improvements in electrochemical performance. These are investigated by means of X-ray powder diffraction, impedance measurement, high resolution transmission electron microscopy, field emission scanning electron microscopy, and measurement of electrochemical capacity. LiOx intercalated at the edge planes reduces the electrolyte breakdown by passivating the highly reactive sites along these planes. The Li-doped natural graphite exhibits â¼5% reduction in the first irreversible capacity while the reversible capacity remains unchanged in comparison with pristine graphite electrode. Also, it has an excellent capacity retention of â¼99% after 50 cycles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 139, Issues 1â2, 4 January 2005, Pages 230-234
Journal: Journal of Power Sources - Volume 139, Issues 1â2, 4 January 2005, Pages 230-234
نویسندگان
Young Tae Lee, Chong Seung Yoon, Yang-Kook Sun,