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Facile Synthesis Of Nb_2O_5 Nanorod Array Films And Their Electrochemical Properties

机译:Nb_2O_5纳米棒阵列膜的简便合成及其电化学性能

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摘要

Nb_2O_5 nanorod array films were synthesized by a facile hydrothermal process using niobium metal foil and NH_4F as precursors. The Nb_2O_5 nanorods stand on the niobium metal foil substrate and are less than l00nm in diameter and about 1 u,m 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 Nb_2O_5 nanorod array films have been tested as cathode material for lithium battery, which showed a good specific capacity up to 380 mAh g-1 even after 50 charge/discharge cycles.
机译:以铌金属箔和NH_4F为前驱体,通过水热法合成了Nb_2O_5纳米棒阵列膜。 Nb_2O_5纳米棒位于铌金属箔基材上,直径小于100nm,长度约1u.m。 X射线衍射(XRD)和高分辨率透射电子显微镜(HRTEM)表征表明,这些纳米棒具有正交结构,并沿(001)方向纵向生长。讨论了纳米棒的生长机理。在低于500°C的温度下进行热退火不会改变纳米棒的微观结构,但会提高结晶度。 Nb_2O_5纳米棒阵列膜已作为锂电池的正极材料进行了测试,即使经过50次充放电循环,也显示出高达380 mAh g-1的良好比容量。

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  • 来源
    《Applied Surface Science》 |2011年第23期|p.10084-10088|共5页
  • 作者单位

    The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China The Graduate School of Chinese Academy of Sciences, Beijing 100084, China;

    The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;

    The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China The Graduate School of Chinese Academy of Sciences, Beijing 100084, China;

    The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;

    The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;

    Sensor Technology Lab, School of Electrical and Computer Engineering, RMIT University, Melbourne 3001, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nb_2O_5; Nanorod; Hydrothermal synthesis; Electrochemical property;

    机译:Nb_2O_5;纳米棒;水热合成;电化学性能;

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