کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
194796 | 459800 | 2006 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical characteristics of copper silicide-coated graphite as an anode material of lithium secondary batteries Electrochemical characteristics of copper silicide-coated graphite as an anode material of lithium secondary batteries](/preview/png/194796.png)
Copper silicide-coated graphite as an anode material was prepared by the sequential employments of plasma enhanced chemical vapor deposition (PECVD) and radio frequency magnetron sputtering (RFMS) method at 300 °C. The silicon-coated graphite exhibited an initial discharge capacity of 540 mAh/g with 76% coulomb efficiency, and the discharge capacity was sharply decreased down to 50% of initial capacity after 30 cycles, probably due to large volume changes during the charge–discharge cycling. Copper silicide-coated graphite, however, exhibited an initial discharge capacity of 480 mAh/g with higher retention capacity of 87% even after 30 cycles, probably due to the enhanced interfacial conductivity. The copper silicide film on the graphite surface played as the active anode material of lithium secondary batteries via the reduction of interfacial resistance and mitigation of volume changes during repeated cycles.
Journal: Electrochimica Acta - Volume 52, Issue 4, 1 December 2006, Pages 1532–1537