The design and synthesis of polyhedral Ti-doped Co₃O₄ with enhanced lithium-storage properties for Li-ion batteries

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• 作者：Yana Li ; Xianhua Hou ; Yajie Li ; Qiang Ru…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：27
• 期：11
• 页码：11439-11446
• 全文大小：1,854 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

Polyhedral Ti-doped Co₃O₄ nanoparticles with a diameter of about 100–300 nm have been easily synthesized by a co-heat precipitated method. The structure and morphology of the materials were characterized by X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. The electrochemical measurements were implemented on half coin cells. Galvanostatic charge, discharge performance, cyclic voltammetry and impedance measurement were utilized to investigate the electrochemical properties. The Ti-doped Co₃O₄ electrodes showed superior performance compared with the undoped Co₃O₄ electrodes, including the enhanced rate capability, and better capacity retention. At current densities of 500 mA g−1, the Ti-doped Co₃O₄ electrodes exhibited initial capacities of 1173.6 and 849.0 mAh g−1, and the capacities were maintained at 850.3 and 838.6 mAh g−1 after 120 cycles. These excellent electrochemical properties can be attributed to the nanoscale structure and Ti doping.