The effects of different cell cans and separators on the first-cycle Coulombic efficiency and long-term cycling stability of high voltage spinel cathode were investigated systematically. Compared to stainless steel (SS) positive-cans, aluminum (Al)-clad SS-316 positive-cans have a much better resistance to oxidation at high voltages thus improving the initial Coulombic efficiency of the batteries by more than 13%. Among the five separators studied in this work, polyethylene (PE) separator shows the best electrochemical stability. The cells using LiCr0.05Ni0.45Mn1.5O4 as cathode, Al-clad positive-can, and PE separator exhibit the first-cycle Columbic efficiency of about 90% and a capacity fading of only 0.01% per cycle.
Revised: June 18, 2012 |
Published: September 1, 2012
Citation
Chen X., W. Xu, J. Xiao, M.H. Engelhard, F. Ding, D. Mei, and D. Hu, et al. 2012.Effects of cell positive cans and separators on the performance of high-voltage Li-ion batteries.Journal of Power Sources 213.PNNL-SA-84951.doi:10.1016/j.jpowsour.2012.04.009