The partially delithiated LFP (Figure ) and the corresponding FeF3 half-cells (Figure , and S8) are characterized in the SI. There are two important conclusions from that analysis. First, the electrochemical characteristics of the FeF3 half-cells correspond closely with those of the Li-FeF3 full cells. More specifically, similar galvanostatic (GV) profiles (Figure , S6c, S9a, and S9b) and capacities (Figure and S8) are obtained.