Abstract
AbstractComposite materials of porous pyrolyzed polyacrylonitrile–sulfur@graphene nanosheet (pPAN–S@GNS) are fabricated through a bottom‐up strategy. Microspherical particles are formed by spray drying of a mixed aqueous colloid of PAN nanoparticles and graphene nanosheets, followed by a simple heat treatment with elemental sulfur. The pPAN–S primary nanoparticles are wrapped homogeneously and loosely within a three‐dimensional network of graphene nanosheets (GNS). The hierarchical pPAN–S@GNS composite shows a high reversible capacity of 1449.3 mAh g−1sulfur or 681.2 mAh g−1composite in the second cycle; after 300 cycles at a 0.2 C charge/discharge rate the capacity retention is 88.8 % of its initial reversible value. Additionally, the coulombic efficiency (CE) during cycling is near 100 %, apart from in the first cycle, in which CE is 81.1 %. A remarkable capacity of near 700 mAh g−1sulfur is obtained, even at a high discharge rate of 10 C. The superior performance of pPAN–S@GNS is ascribed to the spherical secondary GNS structure that creates an electronically conductive 3D framework and also reinforces structural stability.
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Dates
Type | When |
---|---|
Created | 11 years, 10 months ago (Oct. 23, 2013, 12:52 p.m.) |
Deposited | 1 year, 10 months ago (Oct. 16, 2023, 1:46 a.m.) |
Indexed | 2 weeks, 5 days ago (Aug. 5, 2025, 8:34 a.m.) |
Issued | 11 years, 10 months ago (Oct. 23, 2013) |
Published | 11 years, 10 months ago (Oct. 23, 2013) |
Published Online | 11 years, 10 months ago (Oct. 23, 2013) |
Published Print | 11 years, 6 months ago (Feb. 1, 2014) |
@article{Wang_2013, title={Hierarchical Sulfur‐Based Cathode Materials with Long Cycle Life for Rechargeable Lithium Batteries}, volume={7}, ISSN={1864-564X}, url={http://dx.doi.org/10.1002/cssc.201300742}, DOI={10.1002/cssc.201300742}, number={2}, journal={ChemSusChem}, publisher={Wiley}, author={Wang, Jiulin and Yin, Lichao and Jia, Hao and Yu, Haitao and He, Yushi and Yang, Jun and Monroe, Charles W.}, year={2013}, month=oct, pages={563–569} }