Magnetite/graphene composites: microwave irradiation synthesis and enhanced cycling and rate performances for lithium ion batteries

Ming Zhang; Danni Lei; Xiaoming Yin; Libao Chen; Qiuhong Li; Yanguo Wang; Taihong Wang

doi:10.1039/C0JM00638F

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Journal of Materials Chemistry

Volume 20, 2010

Journal of Materials Chemistry was published between 1991 and 2012. From issue 1, 2013, it was replaced by three new journals: Journal of Materials Chemistry A, B and C

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Magnetite/graphene composites: microwave irradiation synthesis and enhanced cycling and rate performances for lithium ion batteries

Ming Zhang,^a Danni Lei,^a Xiaoming Yin,^a Libao Chen,*^a Qiuhong Li,^a Yanguo Wang^a and Taihong Wang*^a

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Corresponding authors

Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education and State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha, China
E-mail: thwang@hnu.cn, lbchen@hnu.edu.cn

J. Mater. Chem., 2010,20, 5538-5543

DOI: 10.1039/C0JM00638F
Received 09 Mar 2010, Accepted 01 Apr 2010
First published online 03 Jun 2010

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Abstract
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By employing microwave irradiation as a heat source, magnetite/graphene composites were synthesized by depositing Fe³⁺ in the interspaces of graphene sheets. The Fe₃O₄ nanoparticles were dispersed on graphene sheets. As anode materials for lithium ion batteries, they showed high reversible capacities, as well as significantly enhanced cycling performances (about 650 mA h g⁻¹ after 50 cycles) and high rate capabilities (350 mA h g⁻¹ at 5 C). The enhancement could be attributed to graphene sheets, which served as electron conductors and buffers. Our results opened a new doorway for the application of graphene sheets to prepare anode materials of lithium ion batteries with superior performances.

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Raman and TG characterization of magnetite/graphene composites
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Ming Zhang
Danni Lei
Xiaoming Yin
Libao Chen
Qiuhong Li
Yanguo Wang
Taihong Wang

Journal of Materials Chemistry

Magnetite/graphene composites: microwave irradiation synthesis and enhanced cycling and rate performances for lithium ion batteries

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