fig4

Figure 4. (A) Current-voltage profiles of the Zn//Zn symmetrical batteries with different electrolytes at 5 mA cm^-2 with 1 mAh cm^-2. (B) Enlarged voltage profiles of the symmetrical cell. (C) Current-voltage profiles of symmetrical cells with different electrolytes at 2 mA cm^-2 and 2 mAh cm^-2. (D) The rate performance of symmetrical cells with a fixed capacity of 1 mAh cm^-2. (E) Corresponding polarization voltage values of symmetrical cells at various current densities.