کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1291077 | 973347 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Silicon/graphite composites as an anode material for lithium ion batteries Silicon/graphite composites as an anode material for lithium ion batteries](/preview/png/1291077.png)
Mixed silicon–graphite composites have been prepared by means of mechanical milling process. Their micro-heterogeneous structure is considered responsible for electrode failures. A fingerprint of this process is seen by cycling the carbonaceous component of the composite in an electrolyte containing small amount of propylene–carbonate (PC). Local voltage drops close to 0 V (versus Li metal) resulted in local electrode mechanical deterioration. In the presence of silicon particles such local disorders would lead to a loose interparticle contact (zones called dead spots). Deterioration pattern of the mixed composite electrode may be considered as a set of ‘dead spots’ spreading across the electrode as the cycling proceeds. Hence, a careful optimization is necessary in order to fabricate composite electrode giving minimum local disorders and having satisfactory cycling performance.
Journal: Journal of Power Sources - Volume 163, Issue 1, 7 December 2006, Pages 215–218