Expandable-graphite-derived graphene for next-generation battery chemistries

Expandable graphite/polyamide-6 nanocomposites

Polyamide-6 (PA-6)/graphite nanocomposites were prepared by melt blending, using a variety of graphites, including virgin graphite, expandable graphites and expanded graphite. The resulting nanocomposites were characterized by X-ray diffraction, thermogravimetric analysis, cone calorimetry, and tensile mechanical analysis. Nanocomposite formation does occur, as denoted by the nanometre dispersi...

Functionalized single graphene sheets derived from splitting graphite oxide.

A process is described to produce single sheets of functionalized graphene through thermal exfoliation of graphite oxide. The process yields a wrinkled sheet structure resulting from reaction sites involved in oxidation and reduction processes. The topological features of single sheets, as measured by atomic force microscopy, closely match predictions of first-principles atomistic modeling. Alt...

Characterizing Emerging Cell Chemistries for Battery Energy Storage Systems

Third harmonic generation in graphene and few-layer graphite films

Nardeep Kumar,1 Jatinder Kumar,1 Chris Gerstenkorn,1 Rui Wang,1,2 Hsin-Ying Chiu,1 Arthur L. Smirl,2 and Hui Zhao1,* 1Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA 2Laboratory for Photonics and Quantum Electronics, University of Iowa, Iowa City, Iowa 52242, USA (Received 5 November 2012; revised manuscript received 13 February 2013; published 18 March 2013)

Facile fabrication of high quality graphene from expandable graphite: simultaneous exfoliation and reduction.

High quality graphenes were prepared from low-cost expandable graphite via a facile hydrazine hydrate or concentrated ammonia-assisted quenching strategy.