%0 Journal Article
%T Three-Dimensional Hierarchical Porous Structure of PPy/Porous-Graphene to Encapsulate Polysulfides for Lithium/Sulfur Batteries
%A Jin Huang
%A Taizhe Tan
%A Yongguang Zhang
%A Zhumabay Bakenov
%J Archive of "Nanomaterials".
%D 2018
%R 10.3390/nano8080606
%X Herein, we demonstrate the fabrication of a three-dimensional (3D) polypyrrole-coated-porous graphene (PPy/PG) composite through in-situ polymerization of pyrrole monomer on PG surface. The PPy/PG displays a 3D hierarchical porous structure and the resulting PPy/PG hybrid serves as a conductive trap to lithium polysulfides enhancing the electrochemical performances. Owing to the superior conductivity and peculiar structure, a high initial discharge capacity of 1020 mAh g£¿1 and the reversible capacity of 802 mAh g£¿1 over 200 cycles are obtained for the S/PPy/PG cathode at 0.1 C, remaining the remarkable cyclic stability. In addition, the S/PPy/PG cathodes demonstrate an excellent rate performance exhibiting 477 mAh g£¿1 at 2 C
%K lithium/sulfur battery
%K hierarchical 3D porous structure
%K sulfur/polypyrrole/porous graphene composite
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6116275/