%0 Journal Article
%T Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
%A Taizhe Tan
%A Yongguang Zhang
%A Yuan Tian
%A Zhenghao Sun
%A Zhihong Chen
%A Zhuo Chen
%J Archive of "Nanomaterials".
%D 2018
%R 10.3390/nano8050303
%X Sulfur/ethylenediamine-functionalized reduced graphene oxide (S/EDA-RGO) nanocomposites were synthesized using a simple process. Ethylenediamine (EDA) was employed as both the reducing agent and the modification component. The morphologies, microstructures, and compositions of S/EDA-RGO composites were characterized by various detection techniques. The data indicated that EDA-RGO used as scaffolds for sulfur cathodes could enhance the electronic conductivity of the composites and strengthen the adsorbability of polysulfides. Meanwhile, the electrochemical properties of both S/EDA-RGO and S/RGO composites that were used as cathodes for lithium-sulfur (Li-S) batteries were investigated. The initial discharge capacity of S/EDA-RGO composites reached 1240 mAh g£¿1, with reversible capacity being maintained at 714 mAh g£¿1 after 100 cycles. The improvement in cycling stability of S/EDA-RGO composites was further verified at different current rates. These findings demonstrated that proper surface modification of RGO by EDA reducing agent might improve the electrochemical performances of Li¨CS batteries
%K ethylenediamine
%K reduced graphene oxides
%K lithium-sulfur batteries
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977317/