Facile synthesis of belt-like Ag_1.2V₃O₈ with excellent stability for rechargeable lithium batteries

详细信息    查看全文

• 作者：Shuquan Liang ; Tao Chen ; Anqiang Pan ; ^{pananqiang@gmail.com} ; Jiang Zhou ; Yan Tang ; Ruomei Wu
• 关键词：Silver vanadium oxide ; Nanobelt ; Lithium ion batteries ; Temperature-dependent
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：1 July, 2013
• 年：2013
• 卷：233
• 期：Complete
• 页码：304-308
• 全文大小：820 K

文摘

Silver vanadium oxide (Ag_1.2V₃O₈) has been successfully synthesized by a facile solid-state reaction between AgNO₃ and sol-gel prepared VOC₂O₄. The morphology and phase of the calcinations products are largely temperature-dependent. The morphologies of the calcinations products evolutes from nanorods to nanobelts and higher purity can be obtained with the raise of temperatures. Nanobelts with a thickness around 200?nm can be obtained at 450?¡ãC. The as-synthesized Ag_1.2V₃O₈ nanobelts are of single crystal. As a cathode material for rechargeable lithium ion batteries, the Ag_1.2V₃O₈ nanobelts exhibit good cyclic stability and high-rate capability. A stable specific discharge capacities of 215, 198, and 174?mA?h?g^?1 can be delivered at the current densities of 50, 100 and 200?mA?g^?1, respectively. The superior performances are attributed to the good reversibility of electrochemically formed LiV₃O₈ and improved conductivity by in-situ formed Ag phase.