Figure 4.
Morphological Characterization, DFT Calculation, and Performance Investigations
(A) Scanning electron micrograph (scale bar, 500 nm) of EFG-S nanocomposite.
(B) DFT calculation showing the interaction between Li2S cluster and EFG.
(C) Long-term cyclability of EFG-S nanocomposite (60 and 69 wt% S) and rGO-S composite (47 wt.% S). Reprinted with permission from (Wang et al., 2014b). Copyright 2014, Nature Publishing Group.
(D) TEM image of G/S nanosheets.
(E) Cyclic performance and Coulombic efficiency of G/S cathode at 0.5 C, compared with pure S cathode. Reprinted with permission from (Fei et al., 2015). Copyright 2015, Wiley-VCH.
(F) Cross-sectional scanning electron micrograph of rGO-S composite film at high magnification.
(G) Cycling performance and Coulombic efficiency of rGO-S mixture and rGO-S composite film electrodes at 0.1 C for 200 cycles and long-term cycle stability of rGO-S composite film electrode at 1 C for 500 cycles. Reprinted with permission from (Cao et al., 2016b). Copyright 2016, Wiley-VCH.