Lattice Breathing Inhibited Layered Vanadium Oxide Ultrathin Nanobelts for Enhanced Sodium Storage

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• 作者：Qiulong Wei ; Zhouyang Jiang ; Shuangshuang Tan ; Qidong Li ; Lei Huang ; Mengyu Yan ; Liang Zhou ; Qinyou An ; Liqiang Mai
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 26, 2015
• 年：2015
• 卷：7
• 期：33
• 页码：18211-18217
• 全文大小：553K
• ISSN：1944-8252

文摘

Operating as the 鈥渞ocking-chair鈥?battery, sodium ion battery (SIB) with acceptable high capacity is a very promising energy storage technology. Layered vanadium oxide xerogel exhibits high sodium storage capacity. But it undergoes large lattice breathing during sodiation/desodiation, resulting in fast capacity fading. Herein, we develop a facile hydrothermal method to synthesize iron preintercalated vanadium oxide ultrathin nanobelts (Fe-VO_x) with constricted interlayer spacing. Using the Fe-VO_x as cathode for SIB, the lattice breathing during sodiation/desodiation is largely inhibited and the interlayer spacing is stabilized for reversible and rapid Na⁺ insertion/extraction, displaying enhanced cycling and rate performance. This work presents a new strategy to reduce the lattice breathing of layered materials for enhanced sodium storage through interlayer spacing engineering.