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

Abstract

We report the synthesis of a graphene-sulfur composite material by wrapping polyethyleneglycol (PEG) coated submicron 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 ~600mAh/g over more than 100 cycles, representing a promising cathode material for rechargeable lithium batteries with high energy density.

published in Nano Letters

References in corpus (1)

• Ni(OH)2 Nanoplates Grown on Graphene as Advanced Electrochemical Pseudocapacitor Materials

Cited by in corpus (8)

• A lithium-ion battery based on a graphene nanoflakes ink anode and a lithium iron phosphate cathode
• Optimal transport and colossal ionic mechano-conductance in graphene crown ethers
• Online State Estimation for a Physics-Based Lithium-Sulfur Battery Model
• Scalable Composites Benefiting from Transition-Metal Oxides as Cathode Materials for Efficient Lithium-Sulfur Batteries
• Highly Efficient Ion Rejection by Graphene Oxide Membranes via Ion-controlling Interlayer Spacing
• Prediction of Li3Fe8B8 compound with rapid one-dimensional ion diffusion channels
• Fabricating Multifunctional Nanoparticle Membranes by a Fast Layer-by-Layer Langmuir-Blodgett Process: Application in Lithium-sulfur Batteries
• Tuning electronic properties and Schottky contact in graphene-based van der Waals heterostructures by electric gating and interlayer coupling