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- Title
Self-assembled reduced graphene oxide/sulfur composite encapsulated by polyaniline for enhanced electrochemistry performance.
- Authors
Fan, Meiqiang; An, Yanling; Yin, Hao; Li, Wen; Sun, Wei; Lin, Zhan
- Abstract
Reduced graphene oxide/sulfur/polyaniline (referred to RGO/S/PANI) composite was self-assembled through in situ synthesis and used to investigate the electrochemical properties of lithium/sulfur cells. The RGO/S/PANI composite possessed 809.3/801.9 mAh g−1 of initial charge/discharge capacities, higher than 588.3/588.2 mAh g−1 for reduced graphene oxide/sulfur (referred to RGO/S) and 681.4/669.9 mAh g−1 for sulfur/polyaniline (referred to S/PANI) at similar conditions. The RGO/S/PANI composite obtained 400 mAh g−1 at 2 C and good reversible capacities of 605.5 and 600.8 mAh g−1 at 100th charge/discharge cycle at 0.1 C, in comparison with low electrochemical performance of RGO/S and S/PANI. The improved properties could be attributed to the collaboration of RGO and PANI. Co-generation of RGO and sulfur acted as seeds for their depositions, stimulated their uniform distributions, and restricted the agglomeration of sulfur particles in situ synthesis. Polyaniline coated RGO/S and stabilized the nanostructure of RGO/S/PANI in repeated charge/discharge cycles. In addition, RGO and PANI provided many electron channels to enhance sulfur conductivity and sufficient void space for sulfur swelling during charge/discharge cycles.
- Subjects
GRAPHENE oxide; SULFUR compounds; POLYANILINES synthesis; ELECTROCHEMISTRY; LITHIUM sulfur batteries
- Publication
Journal of Solid State Electrochemistry, 2018, Vol 22, Issue 3, p667
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-017-3800-3