کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760258 | 1498045 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of silicon powder negative electrodes by copper electroless deposition 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
In order to enhance the electrical conductivity of Si powder, which shows a poor cycleabilty as the anode in lithium secondary batteries due to low electrical conductivity and a severe volume change on cycling, Cu is deposited on the Si surface by a electroless deposition method. As Cu deposition on bare Si powder is found to be unsatisfactory, Si powder is etched to roughen the surface, on to which a large amount of Cu deposit with a uniform coverage is obtained. The resulting anode material exhibits improved cycle performance as a result of conductivity enhancement. The long-term cycleability is, however, still unsatisfactory due to detachment of Cu from the Si surface that is caused by a severe volume change of the Si particles on cycling. The detachment of Cu is greatly suppressed by annealing at 400 °C in an inert atmosphere and, thereby, delivers better cycle performance. The improvement in interfacial stability exhibited by the annealed samples is ascribed to the formation of a Cu3Si alloy phase at the interface and diffusion of Cu atoms into the Si particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 147, Issues 1â2, 9 September 2005, Pages 227-233
Journal: Journal of Power Sources - Volume 147, Issues 1â2, 9 September 2005, Pages 227-233
نویسندگان
Jae Woo Kim, Ji Heon Ryu, Kyu T. Lee, Seung M. Oh,