Figure 5

Electrochemical characterization of FeF2 and FeF3 NRs vs. lithium. Cycling voltammetry of FeF2 (a) and FeF3 (c) NRs at scanning speeds of 0.2 and 0.1 mV s−1, respectively. Galvanostatic charge–discharge curves of FeF2 (b) and FeF3 NRs (d) for 1st, 2nd, and 5th cycles at a current densities of 200 and 50 mA g−1, respectively.