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In‐situ Generated Ultra‐High Dispersion Sulfur 3D‐Graphene Foam for All‐Solid‐State Lithium Sulfur Batteries with High Cell‐Level Energy Density
Author(s) -
Zhu Ruichen,
Liu Fangchao,
Li Wenyan,
Fu Zhengwen
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002150
Subject(s) - sulfur , dispersion (optics) , materials science , in situ , chemical engineering , graphene , high resolution transmission electron microscopy , lithium (medication) , selected area diffraction , energy density , chemistry , nanotechnology , metallurgy , organic chemistry , transmission electron microscopy , theoretical physics , optics , engineering , medicine , physics , endocrinology
In this study, we prepared a free‐standing ultra‐high dispersion sulfur three‐dimensional graphene (S‐3DG) foam by a simple in‐situ synthesis method. The HRTEM and SAED test of the discharged and charged products showed reversible conversion of Li 2 S and S during cycling. All‐solid‐state Li−S batteries with 55% sulfur content can reach initial discharge capacity of 1680 mAh g −1 at 1/16 C and 410 mAh g −1 at 4 C. And the capacity was about 450 mAh g −1 after 20 times cycling tested at 1/8 C. Moreover, Li−S batteries with 80% sulfur loading (8 mg/cm 2 ) exhibited a superior cell‐level energy density of 588.8 Wh kg −1 .