Fig. 5: Battery performance of various Zn | |Cl-I cells.

a CV profiles and b rate performance of the ZnǁCl-I pouch cell in 30 m ZnCl₂ at 0.5 A g_I2⁻¹ and 25 °C. c Corresponding GCD curves at different currents based on the mass of iodine. d Comparison of the average voltage, capacity and cathode materials in different full battery systems, including Li⁺, Na⁺, K⁺, and Zn²⁺ ion batteries, in which the corresponding performance data are exhibited in Supplementary Table 5 for reference. The specific capacities and specific currents were based on the active materials, and it is 0.5 A g_I2⁻¹ based on the mass of iodine. e Storage performance evaluated by resting for different hours at a 100% state of charge at 0.5 A g_I2⁻¹. f The cycling stability and CE of the ZnǁCl-I full cell at 2 A g_I2⁻¹. g Digital image and h cycling performance of the ZnǁCl-I pouch cell at 2.5 mA cm⁻² and 25 °C.