کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1289000 973280 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Si–graphite composites as anode materials for lithium secondary batteries
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Si–graphite composites as anode materials for lithium secondary batteries
چکیده انگلیسی

Two types of Si–graphite (Si–C) composites are synthesized and evaluated for anode materials of lithium secondary batteries. The mechano-chemical milling and the rotational impact blending methods are applied to synthesize two types of Si–C composites. Graphite powders having Si on the surface (type A) is synthesized by mechano-chemical milling using the pitch as a binder. Si embedded inside the graphite particle (type B) is synthesized by rotational impact blending. The loading level of Si is about 20 wt% for both type Si–C composites. The location of Si is verified by observing cross sectional images of particle and conducting EDS mapping. The initial discharge capacity of type B has larger value than that of type A, while the type A shows better cycle performance than type B. The efficiency of first cycle is about 87% for both types A and B.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 195, Issue 18, 15 September 2010, Pages 6031–6036
نویسندگان
, , , , , , , , ,