Volume 2, Issue 2, Pages 323-336 (February 2018) A Two-Dimensional Porous Carbon-Modified Separator for High-Energy-Density Li-S Batteries  Fei Pei, Lele Lin, Ang Fu, Shiguang Mo, Daohui Ou, Xiaoliang Fang, Nanfeng Zheng  Joule  Volume 2, Issue 2, Pages 323-336 (February 2018) DOI: 10.1016/j.joule.2017.12.003 Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 1 Schematic Illustration of the Synthesis and Application of the G@PC/PP Separator in Li-S Batteries (A) Shuttling effect. (B) The separator with a barrier layer for suppressing the polysulfide migration. (C) The synthetic procedures for the G@PC nanosheets. (D) Vacuum filtration deposition for the synthesis of the G@PC/PP separator. Joule 2018 2, 323-336DOI: (10.1016/j.joule.2017.12.003) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 2 Characterizations of the G@PC Nanosheets and G@PC/PP Separator (A–C) Scanning EM images at low (A) and high (B) magnification, and TEM image (C) of the G@PC nanosheets. (D and E) Optical photographs of small (D) and large (E) area G@PC/PP separators. (F) The G@PC/PP separator derived paper crane. (G) Scanning EM image of the pristine PP separator. (H–J) Top-down (H), and low (I) and high (J) magnification cross-section scanning EM images of the G@PC/PP separator. (K) N2 sorption isotherm. (L) Pore-size distribution. (M and N) XPS spectrum (M) and N 1s XPS spectrum (N) of the G@PC nanosheets. Joule 2018 2, 323-336DOI: (10.1016/j.joule.2017.12.003) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 3 Polysulfide-Trapping Capability of the G@PC/PP Separator (A) Optical photographs for the polysulfide solution treated with the same weights of the barrier materials. (B) Optical photographs of the G@PC/PP, PC/PP, G/PP, CNT/PP, CB/PP, and PP separators (the weight of the barrier layers is 0.075 mg cm−2). (C) Polysulfide permeation measurements for the G@PC/PP, PC/PP, G/PP, CNT/PP, CB/PP, and PP separators during the course of polysulfide diffusion from the left side to the right side of the U-shaped glass bottles. Joule 2018 2, 323-336DOI: (10.1016/j.joule.2017.12.003) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 4 Electrochemical Performance of the Slurry-Coated S/CB Cathode Equipped with the G@PC/PP Separator (A) Charge/discharge curves of the G@PC/PP cell at 0.2 C. (B) Cycling performances of the G@PC/PP, PC/PP, G/PP, CNT/PP, CB/PP, and PP cells at 0.2 C. (C) Charge/discharge curves of the G@PC/PP cell at various rates. (D) Rate capabilities of the G@PC/PP, PC/PP, G/PP, CNT/PP, CB/PP, and PP cells. (E) The corresponding capacities at 5 C. (F) Cycling stability of the G@PC/PP cell at 1 C. Joule 2018 2, 323-336DOI: (10.1016/j.joule.2017.12.003) Copyright © 2017 Elsevier Inc. Terms and Conditions

Figure 5 Electrochemical Performance of the Self-Supporting CNT/S Cathodes Equipped with the G@PC/PP Separator (A) Optical photographs of the CNT and CNT/S papers. (B–D) Thermogravimetric curve (B), and low (C) and high (D) magnification scanning EM images of the CNT/S cathodes. (E) Charge/discharge curves of the CNT/S-12.0 cell at 0.2 C. (F) Cycling performances of the CNT/S-6.0, -9.0, and -12.0 cells at 0.2 C. (G) Cycling performance of the CNT/S-6.0 cell at 0.5 C. The weight of the barrier layers in CNT/S-6.0, -9.0, and -12.0 cells is 0.075 mg cm−2. Joule 2018 2, 323-336DOI: (10.1016/j.joule.2017.12.003) Copyright © 2017 Elsevier Inc. Terms and Conditions

Joule 2018 2, 323-336DOI: (10.1016/j.joule.2017.12.003) Copyright © 2017 Elsevier Inc. Terms and Conditions