Facile synthesis of Nb2O5 nanorod array films and their electrochemical
Facile synthesis of Nb2O5 nanorod array films and their electrochemical
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DOI：
10.1016/j.apsusc.2011.07.001
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
文豪;J. Yu;刘志甫;王娇;杨群保;李永祥.
中科院分区：
文献类型：
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作者：
文豪;J. Yu;刘志甫;王娇;杨群保;李永祥.
以铌金属箔和NH4F为前驱体，通过简便的水热法合成了Nb2O5纳米棒阵列薄膜。 Nb2O5纳米棒立在铌金属箔基底上，直径小于100nm，长度约为1μm。 X射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）表征表明这些纳米棒具有斜方结构并沿<001>方向纵向生长。讨论了纳米棒的生长机制。低于500℃的热退火没有改变纳米棒的微观结构，但提高了结晶度。 Nb2O5纳米棒阵列薄膜已作为锂电池正极材料进行了测试，即使经过50次充放电循环后，其比容量仍高达380mAhg−1。
Nb2O5nanorod array films were synthesized by a facile hydrothermal process using niobium metal foil and NH4F as precursors. The Nb2O5nanorods stand on the niobium metal foil substrate and are less than 100nm in diameter and about 1μm in length. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) characterizations indicate that these nanorods have orthorhombic structure and grew longitudinally along 〈001〉 direction. The nanorod growth mechanism was discussed. Thermal annealing at a temperature below 500°C did not change the microstructure of nanorods but improve the crystallinity. The Nb2O5nanorod array films have been tested as cathode material for lithium battery, which showed a good specific capacity up to 380mAhg−1even after 50 charge/discharge cycles.