Laminated Lithium Ion Batteries with improved fast charging capability

Abstract The fast charge and discharge capability of lithium-ion batteries is improved by applying a lamination step during cell assembly. Electrode sheets and separator are laminated into one stack which improves the electrochemical performance as well as the stack assembly process. The effect of non-laminated and laminated interfaces on the reversible capacity during cycling are studied thoroughly in half-cell and full-cell configurations. The fully-laminated cells show a reduction in the capacity losses of 3%, 5% and 12% upon cycling at 2C, 3C and 5C-rate, respectively, while capacity losses of 6%, 11% and 23% are observed in non-laminated cells at the same C-rates. A significant reduction in the capacity fading at high C-rates is observed upon lamination. Additional compression is applied on the cells to compare the effect of lamination and compression on the cell performance. The laminated cells show an improvement in the fast charging capability in comparison to the non-laminated cells.