Dodecahedron-Shaped Porous Vanadium Oxide and Carbon Composite for High-Rate Lithium Ion Batteries

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• 作者：Yifang Zhang ; Anqiang Pan ; Yaping Wang ; Weifeng Wei ; Yanhui Su ; Jimei Hu ; Guozhong Cao ; Shuquan Liang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：8
• 期：27
• 页码：17303-17311
• 全文大小：716K
• 年卷期：0
• ISSN：1944-8252

文摘

Carbon-based nanocomposites have been extensively studied in energy storage and conversion systems because of their superior electrochemical performance. However, the majority of metal oxides are grown on the surface of carbonaceous material. Herein, we report a different strategy of constructing V₂O₅ within the metal organic framework derived carbonaceous dodecahedrons. Vanadium precursor is absorbed into the porous dodecahedron-shaped carbon framework first and then in situ converted into V₂O₅ within the carbonaceous framework in the annealing process in air. As cathode materials for lithium ion batteries, the porous V₂O₅@C composites exhibit enhanced electrochemical performance, due to the synergistic effect of V₂O₅ and carbon composite.