Three-Dimensional Porous Iron Vanadate Nanowire Arrays as a High-Performance Lithium-Ion Battery

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• 作者：Yunhe Cao ; Dong Fang ; Ruina Liu ; Ming Jiang ; Hang Zhang ; Guangzhong Li ; Zhiping Luo ; Xiaoqing Liu ; Jie Xu ; Weilin Xu ; Chuanxi Xiong
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 23, 2015
• 年：2015
• 卷：7
• 期：50
• 页码：27685-27693
• 全文大小：633K
• ISSN：1944-8252

文摘

Development of three-dimensional nanoarchitectures on current collectors has emerged as an effective strategy for enhancing rate capability and cycling stability of the electrodes. Herein, a new type of three-dimensional porous iron vanadate (Fe_0.12V₂O₅) nanowire arrays on a Ti foil has been synthesized by a hydrothermal method. The as-prepared Fe_0.12V₂O₅ nanowires are about 30 nm in diameter and several micrometers in length. The effect of reaction time on the resulting morphology is investigated and the mechanism for the nanowire formation is proposed. As an electrode material used in lithium-ion batteries, the unique configuration of the Fe_0.12V₂O₅ nanowire arrays presents enhanced capacitance, satisfying rate capability and good cycling stability, as evaluated by cyclic voltammetry and galvanostatic discharge–charge cycling. It delivers a high discharge capacity of 293 mAh·g^–1 at 2.0–3.6 V or 382.2 mAh·g^–1 at 1.0–4.0 V after 50 cycles at 30 mA·g^–1.