fig9

Figure 9. (A-C) SEM images of CMK-3/SeS₂@PDA, CMK-3/SeS₂@PDA, and (D) CMK-3/SeS₂ were disassembled, and their corresponding cathode electrode films were taken out and immersed in DOL solvent for 2 h, (E) Comparison of cycle performance between CMK-3/SeS₂ and CMK-3/SeS₂@PDA at a current density of 0.2 A g^-1, (F) Rate performance at various current densities from 0.2 to 5 A g^-1 of CMK-3/SeS₂@PDA, (G) Prolonged cycle life of CMK-3/SeS₂@PDA at a current density of 2 A g^-1[48], Copyright 2017, Wiley-VCH. (H) Schematic diagram of the discharge-charge process of S₈/NMC and Se_nS_8-n/NMC, (I) Schematic model of the Se₂S₆/NMC structure, (J) SEM images of NMCs, (K) Rate performances of Se_nS_8-n/NMC (n = 1-3) at different current densities, (L) Long-term cycling performance of Se₂S₆/NMC at 250 mA g^-1, (M) Cycling performance of Se_nS_8-n/NMC (n = 1-3) at 250 mA g^-1[49]. Copyright 2016, American Chemical Society.