The roles of lithium-philic giant nitrogen-doped graphene in protecting micron-sized silicon anode from fading
Open Access
- 26 October 2015
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 5 (1), 15665
- https://doi.org/10.1038/srep15665
Abstract
A stable Si-based anode with a high initial coulombic efficiency (ICE) for lithium-ion batteries (LIB) is critical for energy storage. In the present paper, a new scalable method is adopted in combination with giant nitrogen-doped graphene and micron-size electrode materials. We first synthesize a new type of freestanding LIB anode composed of micron-sized Si (mSi) particles wrapped by giant nitrogen-doped graphene (mSi@GNG) film. High ICE (>85%) and long cycle life (more than 80 cycles) are obtained. In the mSi@GNG composite, preferential formation of a stable solid electrolyte interphase (SEI) on the surface of graphene sheets is achieved. The formation and components of SEI are identified for the first time by using UV-resonance Raman spectroscopy and Raman mapping, which will revive the study of formation and evolution of SEI by Raman. New mechanism is proposed that the giant graphene sheets protect the mSi particles from over-lithiation and fracture. Such a simple and scalable method may also be applied to other anode systems to boost their energy and power densities for LIB.Keywords
This publication has 53 references indexed in Scilit:
- Graphene‐Encapsulated Si on Ultrathin‐Graphite Foam as Anode for High Capacity Lithium‐Ion BatteriesAdvanced Materials, 2013
- Visualization of arrangements of carbon atoms in graphene layers by Raman mapping and atomic-resolution TEMScientific Reports, 2013
- One-dimensional/two-dimensional hybridization for self-supported binder-free silicon-based lithium ion battery anodesNanoscale, 2013
- Large-area high-throughput synthesis of monolayer graphene sheet by Hot Filament Thermal Chemical Vapor DepositionScientific Reports, 2012
- Crumpled Graphene-Encapsulated Si Nanoparticles for Lithium Ion Battery AnodesThe Journal of Physical Chemistry Letters, 2012
- A review of the features and analyses of the solid electrolyte interphase in Li-ion batteriesElectrochimica Acta, 2010
- Virus-Enabled Silicon Anode for Lithium-Ion BatteriesACS Nano, 2010
- Preparation and Characterization of Si∕C Composite Coated with Polyaniline as Novel Anodes for Li-Ion BatteriesElectrochemical and Solid-State Letters, 2005
- Ordered Structures in Polycarbonate Studied by Infrared and Raman Spectroscopy, Wide-Angle X-ray Scattering, and Differential Scanning CalorimetryMacromolecules, 1998
- Ultraviolet resonance Raman spectrometry for detection and speciation of trace polycyclic aromatic hydrocarbonsAnalytical Chemistry, 1984