Enhanced properties of porous CoFe2O4–reduced graphene oxide composites with alginate binders for Li-ion battery applications

P. Ramesh Kumar; Pratap Kollu; Chella Santhosh; K. Eswara Varaprasada Rao; Do Kyung Kim; Andrews Nirmala Grace

doi:10.1039/C4NJ00419A

Enhanced properties of porous CoFe₂O₄–reduced graphene oxide composites with alginate binders for Li-ion battery applications†

P. Ramesh Kumar,^a Pratap Kollu,*^b Chella Santhosh,^c K. Eswara Varaprasada Rao,^d Do Kyung Kim*^a and Andrews Nirmala Grace*^c

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* Corresponding authors

^a Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
E-mail: dkkim@kaist.ac.kr
Fax: +82-42-350-3310
Tel: +82-42-350-4118

^b DST-INSPIRE Faculty, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India
E-mail: pratapk@iitb.ac.in
Fax: +91-22-2576-7603

^c Centre for Nanotechnology Research, VIT University, Vellore - 632014, India
E-mail: anirmalagrace@vit.ac.in, anirmalagladys@gmail.com

^d Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India

Abstract

Porous CoFe₂O₄ nanoclusters with different concentrations of graphene based composites were synthesized by a simple solvothermal process. The electrochemical properties of prepared CoFe₂O₄–reduced graphene oxide (rGO) composites were evaluated using polyvinylidene fluoride and Na-alginate as binder materials. The CoFe₂O₄ + 20% rGO composite with alginate exhibited a high stable capacity of 1040 mA h g⁻¹ at 0.1 C (91 mA g⁻¹) rate with excellent rate capability. The observed enhancement in electrochemical properties of the CoFe₂O₄ + 20% rGO composite with alginate is due to the high stability and good transportation network while charging–discharging.

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Article information

DOI: https://doi.org/10.1039/C4NJ00419A
Article type: Paper
Submitted: 20 Mar 2014
Accepted: 16 May 2014
First published: 16 May 2014

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New J. Chem., 2014,38, 3654-3661

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Enhanced properties of porous CoFe₂O₄–reduced graphene oxide composites with alginate binders for Li-ion battery applications

P. R. Kumar, P. Kollu, C. Santhosh, K. Eswara Varaprasada Rao, D. K. Kim and A. N. Grace, New J. Chem., 2014, 38, 3654 DOI: 10.1039/C4NJ00419A

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