fig3

Figure 3. Electrochemical properties of Co_0.7Ni_0.3HCF and CoHCF at different temperatures (-30/0/45/60 °C). (A and C) Charge/discharge voltage profiles of Co_0.7Ni_0.3HCF and CoHCF at different rates (0.1/0.5 C) and temperatures (-30/0 °C). (B and D-F) Long-cycle performance of Co_0.7Ni_0.3HCF and CoHCF at different rates (0.1/0.5/5/5 C) and temperatures (-30/0/45/60 °C) from 2 V to 4.2 V.