Journal
JOURNAL OF POWER SOURCES
Volume 293, Issue -, Pages 253-263Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2015.05.075
Keywords
Graphene oxide; Graphenothermal reduction; Exfoliated graphene oxide/iron (II) oxide; Lithium-ion batteries; Anodes; Electrochemical properties
Funding
- Government of India through MANF [F1-17.1/2011/MANF-MUS-AND-213/(SA-III/Website)]
- India research initiative (NUS-IRI) fund (WBS) [R069000006646]
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Graphenothermal Reduction process is used to obtain exfoliated graphene oxide (EG)/iron (II) oxide (FeO) composite prepared at 650 degrees C for 5 h in argon. Structural and compositional analyses of the sample confirm the formation of EG/FeO composite. This composite shows a reversible capacity of 857 mAh g(-1) at a current rate of 50 mA g(-1) in the voltage range 0.005-3.0 V versus Li. An excellent capacity retention up to 60 cycles and high coulombic efficiency of 98% are also observed. Characteristic Fe2+/0 redox peaks observed in Cyclic Voltammetry measurement are explained in correlation with lithium storage mechanism. Thermal, electrical and impedance spectroscopy studies of EG/FeO composite are discussed in detail. Comparative electrochemical cycling studies of EG/FeO composite with Fe2O3 and Fe3O4 materials prepared under controlled conditions are also discussed. (C) 2015 Elsevier B.V. All rights reserved.
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