Synthesis of graphene@Fe3O4@C core–shell nanosheets for high-performance lithium ion batteries. Issue 13 (25th February 2015)

• Record Type: Journal Article
• Authors: Zhang, Zehui; Wang, Fei; An, Qiao; Li, Wei; Wu, Peiyi
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 13(2015)
• Page Start: 7036
• Page End: 7043
• Publication Date: 2015-02-25
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4ta06910b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Graphene@Fe3 O4 @C core–shell nanosheets are synthesized by a one-pot solvothermal method, which are promising candidates as anodes in LIB applications. Abstract : Development of anode materials with high capacity and long cycle life, while maintaining low production cost is crucial for achieving high-performance lithium-ion batteries (LIBs). Herein, we report a simple and cost-effective one-pot solvothermal method to synthesize graphene@Fe3 O4 @C core–shell nanosheets as a LIB anode with improved electrochemical performances. In this case, ferrocene was used as the precursor for both Fe3 O4 and carbon, while graphene oxide was used as a template for the resultant two-dimensional nanostructure and conductive graphene backbone. The obtained graphene@Fe3 O4 @C core–shell nanosheets have a unique core–shell nanostructure, ultrasmall Fe3 O4 nanoparticles (∼6 nm), and a high surface area of ∼136 m 2 g −1, as well as show a high reversible capacity of ∼1468 mA h g −1, an excellent rate capability and long cycle life, which reflects the ability of graphene backbone to enhance the conductivity and carbon coating to prevent agglomeration of iron oxide nanoparticles. These findings provide a new approach to the design and synthesis of high-performance anode materials.