The assembly of cells was subjected to a preconditioning cycle with a cut-off voltage for charge- discharge of between 4.2 and 3.0 V and a current density of 0.1 mA cm2 before charging the cell to a voltage of 4.2 V.
The assembly of cells was subjected to a preconditioning cycle with a cut-off voltage for charge-discharge of between 4.2 and 3.0 V and a current density of 0.1 mA cm2 before charging thecell to a voltage of 4.2 V.