biostudies-literatureUnknown5Liu XA 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 thScientific reports15665https://www.ebi.ac.uk/biostudies/studies/S-EPMC4620504biostudies-literatureThe roles of lithium-philic giant nitrogen-doped graphene in protecting micron-sized silicon anode from fading.PMC4620504Liu XLiu HLi YHuang YHu HLin JChao DZhao JZhang QShen ZXfalseThe roles of lithium-philic giant nitrogen-doped graphene in protecting micron-sized silicon anode from fading.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 th2015-01-01T00:00:00Z2015 Oct2025-04-05T14:30:03.906Z2019-03-27T02:00:45ZS-EPMC46205042649772910.1038/srep15665