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Facile synthesis and electrochemical properties of alpha-phase ferric oxide hematite cocoons and rods as high-performance anodes for lithium-ion batteries

Published online by Cambridge University Press:  05 March 2013

Wei An Ang ,
Nutan Gupta ,
Raghavan Prasanth ,
Huey Hoon Hng  and
Srinivasan Madhavi
Wei An Ang
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798; and Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Singapore 637553
Nutan Gupta
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798; and TUM-CREATE Center for Electromobility, Nanyang Technological University, Singapore 637459
Raghavan Prasanth
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798; and Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Singapore 637553
Huey Hoon Hng
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
Srinivasan Madhavi*
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798; Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Singapore 637553; and TUM-CREATE Center for Electromobility, Nanyang Technological University, Singapore 637459
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Unique cocoon- and rod-shaped alpha-phase ferric oxide, hematite (α-Fe2O3) is prepared by a simple, scalable and surfactant-free chimie douce synthesis. The structure and morphology is confirmed by x-ray diffraction, field-emission scanning electron microscopy and high-resolution transmission electron microscopy. The electrochemical properties of α-Fe2O3 anodes are investigated using cyclic voltammetry, galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy. The mesoporous α-Fe2O3 exhibited an initial discharge capacity >1741 mAh/g with excellent cycling performance and rate capabilities. The solvent used for the preparation of α-Fe2O3 plays a key role in determining the morphology of the materials, which greatly influenced its electrochemical properties.

Keywords

energy storageoxidechemical synthesis
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 6 , 28 March 2013 , pp. 824 - 831
Copyright
Copyright © Materials Research Society 2013

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References

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