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图8 Se@NC/CC电极循环后的SEM照片及机理示意图

Fig. 8 SEM images of Se@NC/CC electrode after cycling and corresponding mechanism diagram (a) Typical SEM image of the Se@NC/CC electrode after 100 cycles at 0.5C; (b) Typical SEM enlarged image of the Se@NC/CC electrode after 100 cycles at 0.5C; (c) Microscopic mechanism of the Se@NC/CC electrode