Fig. 6
a The first three cyclic CV cures of ZnSe/NC-300. b Galvanostatic charge-discharge curves at the current density of 100 mA g−1. c The cycling performance of pure ZnSe, ZnSe/NC-900, ZnSe/NC-300, and ZnSe/NC-40 at the current density of 100 mA g−1. d The cycling performance of pure ZnSe, ZnSe/NC-900, ZnSe/NC-300, and ZnSe/NC-40 at the current density of 1 A g−1. e Rate performance of pure ZnSe, ZnSe/NC-900, ZnSe/NC-300, and ZnSe/NC-40 at the current densities ranging from 0.1 to 2 A g−1. f EIS spectra of pure ZnSe, ZnSe/NC-900, ZnSe/NC-300, and ZnSe/NC-40 before cycling