Electrochemical testing was carried out using Biologic VMP (coin & 3E cells) and Maccor 5 A (pouch cell) cyclers. Upon assembly all cells were transferred to testing rigs and allowed to rest for a 10-hour wetting period. Initial formation cycling consisted of two constant current cycles at C/20 in the voltage range 2.5 -4.5 V, after which Electrochemical Impedance Spectroscopy (EIS) measurements were performed (10 mV AC perturbation in the range 100 kHz -10 mHz). Rate capability tests were then carried out via the charging and discharging of the cells at rates in the range C/3 -10 C (5 cycles at each rate), with varying protocols.