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Nanomaterials 2018, 8(8), 606; https://doi.org/10.3390/nano8080606

Three-Dimensional Hierarchical Porous Structure of PPy/Porous-Graphene to Encapsulate Polysulfides for Lithium/Sulfur Batteries

1
School of Materials and Energy, Synergy Innovation Institute of GDUT (Heyuan), Guangdong University of Technology, Guangzhou 510006, China
2
Institute of Batteries LLC, National Laboratory Astana, School of Engineering, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan
*
Authors to whom correspondence should be addressed.
Received: 3 July 2018 / Revised: 31 July 2018 / Accepted: 3 August 2018 / Published: 9 August 2018
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Abstract

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. View Full-Text
Keywords: lithium/sulfur battery; hierarchical 3D porous structure; sulfur/polypyrrole/porous graphene composite lithium/sulfur battery; hierarchical 3D porous structure; sulfur/polypyrrole/porous graphene composite
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, Y.; Bakenov, Z.; Tan, T.; Huang, J. Three-Dimensional Hierarchical Porous Structure of PPy/Porous-Graphene to Encapsulate Polysulfides for Lithium/Sulfur Batteries. Nanomaterials 2018, 8, 606.

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