Hierarchical MoO2/Mo2C/C Hybrid Nanowires as High-Rate and Long-Life Anodes for Lithium-Ion Batteries

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• 作者：Lichun Yang ; Xiang Li ; Yunpeng Ouyang ; Qingsheng Gao ; Liuzhang Ouyang ; Renzong Hu ; Jun Liu ; Min Zhu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：August 10, 2016
• 年：2016
• 卷：8
• 期：31
• 页码：19987-19993
• 全文大小：418K
• 年卷期：0
• ISSN：1944-8252

文摘

Hierarchical MoO₂/Mo₂C/C hybrid nanowires (MoO₂/Mo₂C/C HNWs) have been fabricated through facile calcination of Mo₃O₁₀(C₆H₅NH₃)₂·2H₂O nanowires which serve as both precursors and self-templates. In the MoO₂/Mo₂C/C HNWs, nanoparticles dispersed in the nanowires are beneficial for Li⁺ transportation due to the decreased diffusion paths. Moreover, hybridization with Mo₂C and carbon facilitates the electron transfer and increases the structural stability without sacrifice of capacity. As anode materials for lithium-ion batteries, the MoO₂/Mo₂C/C HNWs exhibit a reversible capacity of 950 mA h g^–1 after 320 cycles at a current density of 200 mA g^–1. Even when cycled at 2000 mA g^–1, they maintained a reversible capacity of 602 mA h g^–1 after 500 cycles. By incorporation of Mo₂C and C with MoO₂, the MoO₂/Mo₂C/C HNWs show high-rate capability and long cycle life and can be a promising candidate for lithium-ion battery anodes.