63 research outputs found
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
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.Comment: published in Nano Letter
Spektralphotometrische Bestimmung von Kupfer mit Tetraäthylenpentamin oder Triäthylentetramin
Simultaneous spectrophotometric determination of barium and strontium using Sulfonazo III
Wahl der experimentellen Bedingungen f�r die photometrische Komplexbildungstitration von Metallen im ppm-Bereich
TERPENES .264. ABSOLUTE-CONFIGURATION OF XERANTHOLIDE, A SESQUITERPENIC LACTONE FROM ANTHEMIS-AUSTRIACA JACQ
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