Controlled Synthesis of Carbon Nanofibers Anchored with ZnxCo3–xO4 Nanocubes as Binder-Free Anode Materials for Lithium-Ion Batteries

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• 作者：Renzhong Chen ; Yi Hu ; Zhen Shen ; Yanli Chen ; Xia He ; Xiangwu Zhang ; Yan Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 3, 2016
• 年：2016
• 卷：8
• 期：4
• 页码：2591-2599
• 全文大小：643K
• ISSN：1944-8252

文摘

The direct growth of complex ternary metal oxides on three-dimensional conductive substrates is highly desirable for improving the electrochemical performance of lithium-ion batteries (LIBs). We herein report a facile and scalable strategy for the preparation of carbon nanofibers (CNFs) anchored with Zn_xCo_3–xO₄ (ZCO) nanocubes, involving a hydrothermal process and thermal treatment. Moreover, the size of the ZCO nanocubes was adjusted by the quantity of urea used in the hydrothermal process. Serving as a binder-free anode material for LIBs, the ZnCo₂O₄/CNFs composite prepared using 1.0 mmol of urea (ZCO/CNFs-10) exhibited excellent electrochemical performance with high reversible capacity, excellent cycling stability, and good rate capability. More specifically, a high reversible capacity of ～600 mAh g^–1 was obtained at a current density of 0.5 C following 300 charge–discharge cycles. The excellent electrochemical performance could be associated with the controllable size of the ZCO nanocubes and synergistic effects between ZCO and the CNFs.