کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1286003 | 973169 | 2007 | 5 صفحه PDF | دانلود رایگان |
The discharge characteristics of a Li/LiyCoO2 cell were simulated by numerical calculations. Based on the program proposed by Newman's group, the change in entropy due to lithium-ion insertion into the active materials was introduced into the open-circuit potential (OCP) for more practical applications. The OCP of LiCoO2 (y = 1) at a full-discharge state was 3.82 V, which was determined from the original program. However, it should show a rapid decrease to minus infinity when discharge is complete (y = 1), which is due to the introduced entropy term. In addition, the local use of active materials across the LiyCoO2 electrode was not uniform, whereas the original program showed a constant value throughout the electrode. Based on the present results, the introduction of an entropy term to the OCP of LiyCoO2 works reasonably well for more practical applications.
Journal: Journal of Power Sources - Volume 174, Issue 2, 6 December 2007, Pages 779–783