کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1285705 | 973154 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Polytriphenylamine: A high power and high capacity cathode material for rechargeable lithium batteries Polytriphenylamine: A high power and high capacity cathode material for rechargeable lithium batteries](/preview/png/1285705.png)
Polytriphenylamine (PTPAn) was chemically synthesized and tested as a cathode material for high-rate storage and delivery of electrochemical energy. It is found that the polymer has not only superior high power capability but also high energy density at prolonged cycling. At a moderate rate of 0.5C, PTPAn gives a high average discharge voltage of 3.8 V and quite a high capacity of 103 mAh g−1, which is very close to the theoretical capacity (109 mAh g−1) as expected from one electron transfer per triphenylamine monomer. Even cycled at a very high rate of 20C, the polymer can still deliver a capacity of 90 mAh g−1 at 1000th cycle with a nearly 100% coulombic efficiency. The excellent electrochemical performances of PTPAn are explained from the structural specificity of the polymer where the radical redox centers are stabilized and protected by conductive polymeric backbone, making the radical redox and charge-transporting processes kinetically facile for high-rate charge and discharge.
Journal: Journal of Power Sources - Volume 177, Issue 1, 15 February 2008, Pages 199–204