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Spatially Interlinked Graphene with Uniformly Loaded Sulfur for High Performance Li‐S Batteries
Author(s) -
Liu Donghai,
Zhang Chen,
Lv Xiaohui,
Zheng Xiaoyu,
Zhang Lei,
Zhi Linjie,
Yang QuanHong
Publication year - 2016
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500321
Subject(s) - graphene , chemistry , oxide , sulfur , electrochemistry , evaporation , lithium (medication) , nanotechnology , current density , porosity , chemical engineering , graphene foam , hydrothermal circulation , redox , supercapacitor , electrode , graphene oxide paper , inorganic chemistry , materials science , organic chemistry , medicine , physics , quantum mechanics , endocrinology , engineering , thermodynamics
Abstract Lithium‐sulfur (Li‐S) batteries have drawn extensive attentions due to their high energy density, environmental friendliness and low cost. In this study, three‐dimensional (3D) graphene/S hybrid (G/S) is prepared by a one‐pot hydrothermal method together with redox reaction between S‐based compound and graphene oxide (GO). G/S has a three dimensional porous structure, where graphene is interconnected with each other forming a 3D conductive network. It demonstrates that the pore structure of G/S can be well controlled by optimizing the drying method of the 3D graphene‐based materials. Freeze drying and evaporation‐induced drying can induce different density and pore structure of G/S. Electrochemical tests illustrate that the resulting hybrid can deliver a specific capacity of 891 mAh·g −1 and 575 mAh·g −1 for the 1 st and 100 th cycle at a current density of 500 mAh·g −1 .