Fabrication and electrochemical performance of nickel ferrite nanoparticles as anode material in lithium ion batteries

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• 作者：Hongxiao Zhao ; Zhi Zheng ; Ka Wai Wong ; Shumin Wang ; Baojun Huang ; Dapeng Li
• 关键词：NiFe₂O₄ ; Anode materials ; Lithium ion battery ; Electrochemical properties ; Hydrothermal
• 刊名：Electrochemistry Communications
• 出版年：2007
• 出版时间：October 2007
• 年：2007
• 卷：9
• 期：10
• 页码：2606-2610
• 全文大小：612 K

文摘

Nano-sized nickel ferrite (NiFe₂O₄) was prepared by hydrothermal method at low temperature. The crystalline phase, morphology and specific surface area (BET) of the resultant samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and nitrogen physical adsorption, respectively. The particle sizes of the resulting NiFe₂O₄ samples were in the range of 5–15 nm. The electrochemical performance of NiFe₂O₄ nanoparticles as the anodic material in lithium ion batteries was tested. It was found that the first discharge capacity of the anode made from NiFe₂O₄ nanoparticles could reach a very high value of 1314 mAh g⁻¹, while the discharge capacity decreased to 790.8 mAh g⁻¹ and 709.0 mAh g⁻¹ at a current density of 0.2 mA cm⁻² after 2 and 3 cycles, respectively. The BET surface area is up to 111.4 m² g⁻¹. The reaction mechanism between lithium and nickel ferrite was also discussed based on the results of cycle voltammetry (CV) experiments.