Self-Assembled Sandwich-like Vanadium Oxide/Graphene Mesoporous Composite as High-Capacity Anode Material for Lithium Ion Batteries

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• 作者：Xingchao Wang ; Yudai Huang ; Dianzeng Jia ; Wei Kong Pang ; Zaiping Guo ; Yaping Du ; Xincun Tang ; Yali Cao
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：December 21, 2015
• 年：2015
• 卷：54
• 期：24
• 页码：11799-11806
• 全文大小：512K
• ISSN：1520-510X

文摘

Sandwich-like V₂O₅/graphene mesoporous composite has been synthesized by a facile solvothermal approach. The crystalline structure, morphology, and electrochemical performance of the as-prepared materials have been investigated in detail. The results demonstrate that the 30鈥?0 nm V₂O₅ particles are homogeneously anchored on conducting graphene sheets, which allow the V₂O₅ nanoparticles to be wired up to a current collector through the underlying conducting graphene layers. As an anode material for lithium ion batteries, the composite exhibits a high reversible capacity of 1006 mAh g^鈥? at a current density of 0.5 A g^鈥? after 300 cycles. It also exhibits excellent rate performance with a discharge capacity of 500 mAh g^鈥? at the current density of 3.0 A g^鈥?, which is superior to the performance of the vanadium-based materials reported previously. The electrochemical properties demonstrate that the sandwich-like V₂O₅/graphene mesoporous composite could be a promising candidate material for high-capacity anode in lithium ion batteries.