Fig. 4: Electrochemical performances of the symmetric and asymmetric cells with the coating of PAH/PAA multilayers.

The galvanostatic cycling performances of Zn||Zn symmetric cells at a 1 mA cm⁻² and 1 mAh cm⁻², b 5 mA cm⁻² and 5 mAh cm⁻², and c 8 mA cm⁻² and 4 mAh cm⁻². d The CE performance of Cu||Zn asymmetric cells at 0.5 mA cm⁻² and 0.25 mAh cm⁻². e The corresponding voltage profile at first cycle of Cu||Zn asymmetric cells at 0.5 mA cm⁻² and 0.25 mAh cm⁻². f Comparison of recent anode performance regarding CPC, cycle number, and average CE.