Enhancement of Electrochemical Stability about Silicon/Carbon Composite Anode Materials for Lithium Ion Batteries. (1st October 2015)

• Record Type: Journal Article
• Authors: Xiao, Wei; Miao, Chang; Yan, Xuemin; Sun, Qing; Mei, Ping
• Other Names: Wan Jiayu Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2015(2015)
• Publication Date: 2015-10-01
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2015/926256
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : Silicon/carbon (Si/C) composite anode materials are successfully synthesized by mechanical ball milling followed by pyrolysis method. The structure and morphology of the composite are characterized by X-ray diffraction and scanning electron microscopy and transmission electron microscope, respectively. The results show that the composite is composed of Si, flake graphite, and phenolic resin-pyrolyzed carbon, and Si and flake graphite are enwrapped by phenolic resin-pyrolyzed carbon, which can provide not only a good buffering matrix but also a conductive network. The Si/C composite also shows good electrochemical stability, in which the composite anode material exhibits a high initial charge capacity of 805.3 mAh g −1 at 100 mA g −1 and it can still deliver a high charge capacity of 791.7 mAh g −1 when the current density increases to 500 mA g −1 . The results indicate that it could be used as a promising anode material for lithium ion batteries.