Mesoporous graphene/carbon framework embedded with SnO2 nanoparticles as a high-performance anode for lithium storage. Issue 5 (4th April 2017)

• Record Type: Journal Article
• Authors: Wang, Xiongwei; Zhang, Ludan; Zhang, Congcong; Wu, Peiyi
• Is Part Of: Inorganic chemistry frontiers. Volume 4:Issue 5(2017)
• Page Start: 889
• Page End: 897
• Publication Date: 2017-04-04
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7qi00057j
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : A uniform graphene-based mesoporous carbon framework as a robust matrix for embedding SnO2 nanoparticles for long-life lithium storage. Abstract : The huge volume variation and poor electronic conductivity of tin oxide (SnO2 ) during the discharge/charge process greatly limit its practical application in lithium ion batteries (LIBs). Hybridization with graphene is a widely-used method to improve its electrochemical performance, but it still faces some limitations. In this work, we integrate carbon encapsulation with graphene hybridization to synthesize a sandwich-like carbon-coated SnO2 /graphene composite via a flexible method. In this case, a mesoporous graphene/carbon framework (MCF) derived from acid etching of an as-prepared graphene@Fe3 O4 @C composite was used as a robust matrix for the embedment of SnO2 . When evaluated as an anode material for LIBs, the resultant MCF@SnO2 composite exhibits a high second reversible capacity of 1205 mA h g −1 at 0.2 A g −1, excellent cycling performance with 668 mA h g −1 capacity retention after 200 cycles at 1.0 A g −1, and a good rate capability. This facile strategy could be further extended to embed other metal oxide nanoparticles into the mesoporous carbon framework for applications in energy conversion and storage.