@article{7d198edf6250476ba1aecf1a225ed0c0,
title = "Graphene wrapped silicon nanocomposites for enhanced electrochemical performance in lithium ion batteries",
abstract = "The electrical isolation of fractured silicon and unstable solid electrolyte interphase formed on silicon's surface are two major issues preventing commercialization of silicon anodes in next-generation lithium ion batteries. In this work, we wrap silicon nanoparticles with graphene to maintain the electrical connection, meanwhile, isolating Si from the electrolyte to suppress SEI formation on the Si surface. A facile freeze-drying method followed by thermal reduction was used to synthesize the silicon-graphene (Si-G) composites. We found that the Si-NP's can be tightly wrapped by graphene when the composites utilized an optimal starting ratio of 1:2 (Si-NP:GO), attributing to significantly improved cyclic stability and cycle efficiency. Taking the facile fabrication method and the use of commercial Si-NP's into account, Si-G composites could be a promising candidate for the anode material in lithium ion batteries (LIBs).",
keywords = "Electrochemical Performance, Freeze Drying, Graphene Wrapping, Lithium ion battery, Silicon Electrodes",
author = "Victor Chabot and Kun Feng and Park, {Hey Woong} and Hassan, {Fathy M.} and Elsayed, {Abdel Rahman} and Aiping Yu and Xingcheng Xiao and Zhongwei Chen",
note = "Funding Information: This work was financially supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), General Motors (GM), the University of Waterloo and the Waterloo Institute for Nanotechnology. XCX also acknowledges the support by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, Subcontract No 7056410 under the Batteries for Advanced Transportation Technologies (BATT) Program. TEM images were obtained at the Canadian Center for Electron Microscopy at McMaster University. Funding Information: This work was financially supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), General Motors (GM), the University of Waterloo and the Waterloo Institute for Nanotechnology. XCX also acknowledges the support by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, Subcontract No 7056410 under the Batteries for Advanced Transportation Technologies (BATT) Program. TEM images were obtained at the Canadian Center for Electron Microscopy at McMaster University. ? Electronic supplementary information (ESI) available: SEM images of silicon and graphene, more XRD patterns, HRTEM images and battery performance results are available in Fig. S1-S6. Publisher Copyright: {\textcopyright} 2014",
year = "2014",
month = jun,
day = "1",
doi = "10.1016/j.electacta.2014.02.135",
language = "English",
volume = "130",
pages = "127--134",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
}