کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1297387 | 1498397 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of LiFePO4 coating on electrochemical performance of LiCoO2 at high temperature Effect of LiFePO4 coating on electrochemical performance of LiCoO2 at high temperature](/preview/png/1297387.png)
LiFePO4 coating on LiCoO2 with a thickness ranging 10–100 nm improved the electrochemical performance of the cathode material at high temperature and high potential. At 60 °C and at a rate of 1 C, 5.0 wt.% LiFePO4-coated LiCoO2 showed better capacity retention (132 mAh/g) with 4.2 V charge-cutoff after 250 cycles, while the bare cathode (pure LiCoO2) showed 5% capacity retention under the same conditions after only 150 cycles. When cycled at 60 and 75 °C, the amount of Co dissolution from LiCoO2 was greatly reduced in the LiFePO4-coated cathode material. The coating layer of LiFePO4 not only protects the LiCoO2 but also serves as an active cathode material with good conductivity. The LiFePO4-coated LiCoO2 could be a high performance cathode material for Li-ion battery.
Journal: Solid State Ionics - Volume 178, Issues 1–2, 31 January 2007, Pages 131–136