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One-pot synthesis of nano-NiFe2O4 pinning on the surface of the graphite composite asSsuperiorSanodes for Li-ion batteries
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Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University，Engineering Research Center of Materials & Technology for Electrochemical Energy Storage (Ministry of Education), Guangzhou 510006, China,Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Zhongshan Institute, University of Electronic Science and Technology, Zhongshan 528400, China,Institute of Advanced Materials, Nanjing University of Technology, Nanjing 210009, China

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    Abstract:

    Nickel ferrite and related materials have recently received considerable attention as potential anode in lithium-ion batteries for their high theoretical specific capacities. To overcome the problem of low intrinsic electronic conductivity and large volume expansion during the Li insertion/extraction process, in this work, nano-NiFe2O4 pinning on the surface of the graphite composite is prepared by hydrothermal method. As the superior anode material, the as-obtained nano-NiFe2O4/graphite composite demonstrates high capacity and excellent cycle stability. An initial specific discharge capacity of approximately 1478 mAh g-1 and a reversible specific capacity of approximately 1109 mAh g-1 after 50 cycles at a current density of 100 mA g-1 are reached. When the charging current is increased to 1000 mA g-1, it also delivers a charge capacity of 750 mAh g-1. The excellent performances are attributed to the special structure of NiFe2O4 nanoparticles pinning on the surface of the graphite, especially the enhanced electronic conductivity and area specific capacitance during the cycling process.

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[Xianhua Hou, Xiaoqin Tang, Shejun Hu, Xinyu Wang, Yumei Gao, Xiang Liu. One-pot synthesis of nano-NiFe2O4 pinning on the surface of the graphite composite asSsuperiorSanodes for Li-ion batteries[J]. Rare Metal Materials and Engineering,2017,46(5):1169~1175.]
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History
  • Received:January 30,2015
  • Revised:February 27,2015
  • Adopted:May 13,2015
  • Online: September 27,2017

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