کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1289422 | 973297 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrolyte additive to improve performance of MCMB/LiNi1/3Co1/3Mn1/3O2 Li-ion cell Electrolyte additive to improve performance of MCMB/LiNi1/3Co1/3Mn1/3O2 Li-ion cell](/preview/png/1289422.png)
The electrolyte additive, 3,9-divinyl-2,4,8,10-tetraoxaspiro[5,5] undecane (TOS), was investigated as a means to improve the life of mesocarbon microbead (MCMB)/Li1.1[Ni1/3Co1/3Mn1/3]0.9O2 (NCM) cells for high-power applications. With the addition of an appropriate amount of TOS (no more than 1 wt%) to MCMB/NCM cells, the capacity retention was significantly improved at 55 °C compared with cells containing pristine electrolyte. Aging tests at 55 °C indicated that the capacity retention of the negative electrode had benefited as a result of the formation of a stable passivation film at the surface of the carbon electrode due to TOS reduction. Electrochemical impedance spectroscopy showed that a TOS addition of more than 0.5 wt% increased the cell interfacial impedance. Differential scanning calorimetry showed that the thermal stability of lithiated MCMB was also improved with the TOS addition.
Journal: Journal of Power Sources - Volume 195, Issue 19, 1 October 2010, Pages 6888–6892