Graphene-Wrapped Sulfur Particles as a Rechargeable Lithium–Sulfur Battery Cathode Material with High Capacity and Cycling Stability

We report the synthesis of a graphene–sulfur composite material by wrapping poly(ethylene glycol) (PEG) coated submicrometer sulfur particles with mildly oxidized graphene oxide sheets decorated by carbon black nanoparticles. The PEG and graphene coating layers are important to accommodating volume...

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Bibliographic Details
Published in:Nano letters 2011-07, Vol.11 (7), p.2644-2647
Main Authors: Wang, Hailiang, Yang, Yuan, Liang, Yongye, Robinson, Joshua Tucker, Li, Yanguang, Jackson, Ariel, Cui, Yi, Dai, Hongjie
Format: Article
Language:English
Subjects:
Applied sciences
Cathodes
Coating
Cross-disciplinary physics: materials science
rheology
Direct energy conversion and energy accumulation
Electric Power Supplies
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrodes
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Graphene
Graphite - chemistry
Lithium - chemistry
Materials science
Materials Testing
Nanocrystalline materials
Nanoparticles - chemistry
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotechnology
Particle Size
Particulate composites
Physics
Polyethylene Glycols - chemistry
Rechargeable batteries
Specific materials
Sulfur
Sulfur - chemistry
Surface Properties
Trapping
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Description
Summary:We report the synthesis of a graphene–sulfur composite material by wrapping poly(ethylene glycol) (PEG) coated submicrometer sulfur particles with mildly oxidized graphene oxide sheets decorated by carbon black nanoparticles. The PEG and graphene coating layers are important to accommodating volume expansion of the coated sulfur particles during discharge, trapping soluble polysulfide intermediates, and rendering the sulfur particles electrically conducting. The resulting graphene–sulfur composite showed high and stable specific capacities up to ∼600 mAh/g over more than 100 cycles, representing a promising cathode material for rechargeable lithium batteries with high energy density.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl200658a