Facile synthesis of monodispersed 3D hierarchical Fe3O4 nanostructures decorated r-GO as the negative electrodes for Li-ion batteries. (January 2018)

• Record Type: Journal Article
• Authors: Kumar, S. Rajesh; Kim, Jong Guk; Viswanathan, C.; Kim, Won Bae; Selvan, R. Kalai; Ponpandian, N.
• Is Part Of: Materials research bulletin. Volume 97(2018)
• Page Start: 272
• Page End: 280
• Publication Date: 2018-01
• Subjects: Solvothermal method -- Nanocomposite -- Magnetic materials -- Nanostructures -- Electrochemical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.08.030
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Monodispersed Fe3 O4 nanostructures with different shapes synthesized by solvothermal method. The fabricated Fe3 O4 /r-GO electrode delivers an initial discharge capacity of 1221 mAh g −1 at 100 mAh g −1 . Fe3 O4 /r-GO significantly enhances the cyclic stability and rate capability than bare Fe3 O4 nanoparticles Abstract: One-pot solvothermal process is adopted to develop, 3D hierarchical Fe3 O4 nanoparticles supported 2D reduced graphene oxide sheets (Fe3 O4 /r-GO) as possible negative electrodes for lithium ion batteries. The synthesis parameters are optimized to prepare agglomeration-free Fe3 O4 nanostructures with uniform size and shape on r-GO. The field emission scanning electron microscopic (FESEM) image reveals that the 3D hierarchical Fe3 O4 nanostructures are uniformly decorated on r-GO. The physicochemical and functional properties of Fe3 O4 /r-GO are systematically investigated using various techniques. The fabricated Fe3 O4 /r-GO electrode delivers an initial discharge capacity of 1221 mAh g −1 at a current density of 100 mA g −1 and retains the specific capacity of 1560 mAh g −1 after 100 cycles. Fe3 O4 /r-GO significantly enhances cyclic performance, when compared with bare Fe3 O4 nanoparticles due to the uniform distribution of Fe3 O4 nanoparticles on the graphene sheet with the more number of electrochemically active sites.