Direct amination of Si nanoparticles for the preparation of Si@ultrathin SiOx@graphene nanosheets as high performance lithium-ion battery anodes. Issue 39 (7th September 2015)

• Record Type: Journal Article
• Authors: Niu, Jin; Zhang, Su; Niu, Yue; Song, Huaihe; Chen, Xiaohong; Zhou, Jisheng; Cao, Bin
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 39(2015)
• Page Start: 19892
• Page End: 19900
• Publication Date: 2015-09-07
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta05386b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Graphene nanosheet encapsulated Si nanoparticles with an ultrathin silica shell have been fabricated by an environmentally friendly and effective amination method. Abstract : NH2 -terminated Si nanoparticles with an ultrathin silica shell have been efficiently obtained by a one-step reaction in ammonia–water–ethanol solution. Graphene nanosheet (GNS) encapsulated Si@ultrathin SiO x has been fabricated by self-assembly and thermal treatment. Because of the uniform ultrathin SiO x shell and superior GNS encapsulation structure, this material shows a reversible capacity of 2391.3 mA h g −1, maintaining 1844.9 mA h g −1 after 50 cycles at a current density of 200 mA g −1, and good rate and long cycle performance (∼700 mA h g −1 at 2000 mA g −1 after 350 cycles) as well.