Fabrication of Various V2O5 Hollow Microspheres as Excellent Cathode for Lithium Storage and the Application in Full Cells

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• 作者：Xiaochuan Ren ; Yanjun Zhai ; Lin Zhu ; Yanyan He ; Aihua Li ; Chunli Guo ; Liqiang Xu
• 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：17205-17211
• 全文大小：498K
• 年卷期：0
• ISSN：1944-8252

文摘

Vanadium pentoxide (V₂O₅) has attracted interesting attention as cathode material for LIBs because of its stable crystal structure and high theoretical specific capacity. However, the low rate performance and poor long-term cycling stability of V₂O₅ limit its applications. In order to improve its battery performance, various V₂O₅ hollow microspheres including a yolk–shell structure, double-shell structure, triple-shell structure, and hierarchical hollow superstructures have been selectively prepared. The obtained hierarchical V₂O₅ hollow microspheres (HVHS) exhibit a high capacity of 123 mAh g^–1 at 20 C (1 C = 147 mA g^–1) in the range of 2.5–4.0 V, and 73.5 mAh g^–1 can be reached after 3000 cycles. HVHS also display good cycling performance in the range of 2.0–4.0 V. Moreover, the V₂O₅//Li₄Ti₅O₁₂ full cell was successfully assembled, which exhibits an excellent performance of 139.5 mAh g^–1 between 1.0 and 2.5 V at a current density of 147 mA g^–1, and a high capacity of 106 mAh g^–1 remained after 100 cycles, indicating the good cycling performance and promising application of the full cell.