A Study of Nanosize Fe₃O₄ Deposited on Carbon Matrix

Abstract

Nanosized crystalline Fe3O4 (with an average particle size of 16 nm) was successfully synthesized on a carbon matrix surface. The prepared sample was heat-treated in the temperature range 300 degrees C - 750 degrees C to remove residual impurities and to obtain a final product with a 77:23 ratio between magnetite and the carbon support. The sample was subjected to physicochemical and electrochemical tests. The purity of the phase and the particles size was determined by X-ray diffraction analysis and confirmed by field emission scanning electron micrographs. The specific surface area of the sample measured by the B.E.T method was 120 m2 g(-1). A series of electrochemical tests including EIS, CV and long-term constant current cycling have been performed. The obtained reversible capacity within 15 cycles was in the range 400-550 mA h x g(-1). The electrochemical behavior of the test sample and its possible practical use as an anode material in lithium secondary batteries are discussed.

Structure and electrochemical performance of nanostructured Fe3O4/carbon nanotube composites as anodes for lithium ion batteries

“…The C/Fe 3 O 4 composite nanofiber exhibits much better electrochemical performance with a high reversible capacity of 1007 mAh g −1 at the 80th cycle and excellent rate capability [10]. Banov et al prepared the nanosize Fe 3 O 4 /carbon composites, whose reversible capacity was measured in the range 400-550 mAh g −1 in the 15th charge/discharge cycle [11].…”

Preparation of Fe2O3/graphene composite and its electrochemical performance as an anode material for lithium ion batteries

“…Graphene, a new crystalline form of carbon, has attracted tremendous scientific interest in both the fundamental and the applied area since it was discovered [19]. It is a very potential material for applications in many technological fields such as nanoelectronics [20], sensors [21], batteries [22] and supercapacitors [23].…”

High-Yield Gas−Liquid Interfacial Synthesis of Highly Dispersed Fe3O4 Nanocrystals and Their Application in Lithium-Ion Batteries

“…Magnetite (Fe 3 O 4 ) nanoparticles are very useful in bioanalysis, ferrofluids, magnetic resonance imaging, and Li + -ion-battery applications. − Most of these applications require that the Fe 3 O 4 nanoparticles to be chemically stable, uniform in size, and well-dispersed in liquid media, preferably in water. Important progress has been made in the chemical synthesis of Fe 3 O 4 nanoparticles.…”