Figure 4.

a) CV curves at 0.1 mV s⁻¹, b) rate capabilities, c) the initial charge potential of the different C rates, and d) cycling performance at 0.2 C for CoSe–ZnSe/S and ZnSe/S cathodes. Capacity contributions of Q _H and Q _L and the Q _L/Q _H ratios of the representative cycles for the e) CoSe–ZnSe/S and f) ZnSe/S cathodes. g) EIS of different cathodes before cycling and after 100 cycles at 0.2 C. h) Long‐term cycling performances at 2 C for CoSe–ZnSe/S and ZnSe/S cathodes. i) Charge–discharge profiles at various C rates. j) Cycling performances at 0.1 C of CoSe–ZnSe/S electrodes with a high sulfur loading.