Issue 15, 2015

Pyrite FeS2 microspheres wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes

Abstract

A composite of pyrite FeS2 microspheres wrapped by reduced graphene oxide (FeS2/rGO) has been synthesized by a facile one-step solvothermal method and applied as an anode in lithium ion batteries (LIBs). Impedance measurements and transmission electron microscopy show that incorporation of rGO significantly decreases the charge transfer resistance and improves the structural stability of the composite. As an anode material for LIBs, the composite exhibits a high capacity of 970 mA h g−1 at a current density of 890 mA g−1 after 300 cycles. Additionally, this composite anode shows impressive performance especially at high current densities. The LIB shows a capacity of 380 mA h g−1 even at a high current density of 8900 mA g−1 (10C) over 2000 cycles, demonstrating its potential for applications in LIBs with long cycling life and high power density.

Graphical abstract: Pyrite FeS2 microspheres wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes

Article information

Article type
Paper
Submitted
06 Feb 2015
Accepted
06 Mar 2015
First published
06 Mar 2015

J. Mater. Chem. A, 2015,3, 7945-7949

Author version available

Pyrite FeS2 microspheres wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes

H. Xue, D. Y. W. Yu, J. Qing, X. Yang, J. Xu, Z. Li, M. Sun, W. Kang, Y. Tang and C. Lee, J. Mater. Chem. A, 2015, 3, 7945 DOI: 10.1039/C5TA00988J

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