title: Flexible holey graphene paper electrodes with enhanced rate capability for energy storage applications.
abstract: The unique combination of high surface area, high electrical conductivity and robust mechanical integrity has attracted great interest in the use of graphene sheets for future electronics applications. Their potential applications for high-power energy storage devices, however, are restricted by the accessible volume, which may be only a fraction of the physical volume, a consequence of the compact geometry of the stack and the ion mobility. Here we demonstrated that remarkably enhanced power delivery can be realized in graphene papers for the use in Li-ion batteries by controlled generation of in-plane porosity via a mechanical cavitation-chemical oxidation approach. These flexible, holey graphene papers, created via facile microscopic engineering, possess abundant ion binding sites, enhanced ion diffusion kinetics, and excellent high-rate lithium-ion storage capabilities, and are suitable for high-performance energy storage devices.
authors: Chemical and Biological Engineering Department, Northwestern University, Evanston, Illinois 60208-3120, USA.
authors: Xin
authors: X
authors: Zhao
authors: Cary M
authors: CM
authors: Hayner
authors: Mayfair C
authors: MC
authors: Kung
authors: Harold H
authors: HH
authors: Kung
mesh_terms: D004553:Electric Conductivity; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D004579:Electron Transport; D006108:Graphite / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D010209:Paper
chemical_list: D010087:Oxides; D006108:Graphite