Effects of cell positive cans and separators on the performance of high-voltage Li-ion batteries
Chen X, W Xu, J Xiao, MH Engelhard, F Ding, D Mei, D Hu, J Zhang, and J Zhang. 2012. "Effects of cell positive cans and separators on the performance of high-voltage Li-ion batteries." Journal of Power Sources 213:160-168. doi:10.1016/j.jpowsour.2012.04.009
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.