Spatially Interlinked Graphene with Uniformly Loaded Sulfur for High Performance Li-S Batteries  

作　　者：Donghai Liu Chen Zhang Xiaohui Lv Xiaoyu Zheng Lei Zhang Linjie Zhi Quan-Hong Yang 

机构地区：[1]Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China [3]National Center for Nanoscience and Technology, Beijing 100190, China

出　　处：《Chinese Journal of Chemistry》2016年第1期41-45,共5页中国化学（英文版）

基　　金：Acknowledgement We appreciate support from National Basic Research Program of China （2014CB932403） and National Natural Science Foundation of China （Nos. 51372167 and 51302146）.

摘　　要：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 .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 .

关 键 词：Li-S battery GRAPHENE three-dimensional graphene/S hybrid different drying methods 

分 类 号：TQ444[化学工程—化学肥料工业] O613.71[理学—无机化学]