Abstract
Herein, we demonstrate the fabrication of a three-dimensional (3D) polypyrrole-coatedporous 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.
| Original language | English |
|---|---|
| Article number | 606 |
| Journal | Nanomaterials |
| Volume | 8 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 9 2018 |
Keywords
- Hierarchical 3D porous structure
- Lithium/sulfur battery
- Sulfur/polypyrrole/porous graphene composite
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Science(all)
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Cite this
Zhang, Y., Bakenov, Z., Tan, T., & Huang, J. (2018). Three-dimensional hierarchical porous structure of PPy/porous-graphene to encapsulate polysulfides for lithium/sulfur batteries. Nanomaterials, 8(8), [606]. https://doi.org/10.3390/nano8080606