The cells were tested on a multi-channel battery test system
(NEWARE BTS-610) with galvanostatic charge and discharge in different
selected voltage ranges. Cyclic voltammetry (CV) and AC
impedance spectroscopy measurements on the cells were performed
with a CHI 604B electrochemical workstation. For the latter,
the cells were first cycled galvanostatically at 0.2 C rate for 3 cycles.