کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1285603 | 973149 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dual active material composite cathode structures for Li-ion batteries Dual active material composite cathode structures for Li-ion batteries](/preview/png/1285603.png)
The efficacy of composite Li-ion battery cathodes made by mixing active materials that possessed either high-rate capability or high specific energy was examined. The cathode structures studied contained carbon-coated LiFePO4 and either Li[Li0.17Mn0.58Ni0.25]O2 or LiCoO2. These active materials were arranged using three different electrode geometries: fully intermixed, fully separated, or layered. Discharge rate studies, cycle-life evaluation, and electrochemical impedance spectroscopy studies were conducted using coin cell test structures containing Li-metal anodes. Results indicated that electrode configuration was correlated to rate capability and degree of polarization if there was a large differential between the rate capabilities of the two active material species.
Journal: Journal of Power Sources - Volume 177, Issue 2, 1 March 2008, Pages 528–536