One-pot synthesis of carbon coated Fe3O4 nanosheets with superior lithium storage capability. Issue 8 (28th January 2015)

• Record Type: Journal Article
• Authors: Gao, Guoxin; Lu, Shiyao; Dong, Bitao; Zhang, Zhicheng; Zheng, Yuansuo; Ding, Shujiang
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 8(2015)
• Page Start: 4716
• Page End: 4721
• Publication Date: 2015-01-28
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4ta05725b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Large-scale flat Fe3 O4 nanosheets coated by an amorphous carbon overlayer (denoted as Fe3 O4 @C NSs) was prepared via a simple one-pot solution method. When evaluated as an electrode for LIBs, the as-prepared Fe3 O4 @C NSs hybrids exhibit highly enhanced lithium storage properties. Abstract : Hybrid nanosheet structures based on carbon coated metal oxides still attract promising interest as high-performance electrode materials for next-generation lithium-ion batteries (LIBs). In this study, we develop a simple one-pot solution method to synthesize large-scale flat Fe3 O4 nanosheet hybrid structures coated with an amorphous carbon overlayer (denoted as Fe3 O4 @C NSs) followed by a thermal annealing treatment. It is found that the refluxing temperature plays an important role in adjusting the morphology of the Fe3 O4 @C hybrid. Increasing the temperature from 140 °C to 200 °C will lead to flower-like hybrid structures constructed by Fe3 O4 nanoflakes gradually growing, rupturing, and finally evolving into flat and completely separate nanoflakes with large size at 200 °C. When evaluated as an anode material for LIBs, the hybrid Fe3 O4 @C NSs demonstrate a high reversible capacity of 1232 mA h g −1 over 120 cycles at a current density of 200 mA g −1, and remarkable rate capability.