Figure 4. Charge storage performance of V$$ _4 $$C$$ _3 $$T$$ _z $$ film electrodes in a half-cell setup. (A) CVs (step 7 and cycle 2) at 0.5 mV s-1 in a -0.7 to 0.8 V vs. Ag electrochemical window and in a 12.5 m, 15 m, 17.5 n and 19 m LiBr electrolytes, (B) CVs (step 7 and cycle 2) at 0.5 mV s-1 in a -0.7 to 0.7 V vs. Ag electrochemical window and in a 5 m, 7.5 m and 10 m electrolytes, (C and D) charge storage (cathodic and anodic) per unit mass vs. cycle number curves for electrodes tested using CV at 10 mV s-1 and in (C) 15 m, 17.5 m and 19 m and (D) 5, 7.5 and 10 m LiBr electrolytes.