高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (3): 618.

• 研究论文 • 上一篇    下一篇

花状NH4V4O10微纳米结构的水热制备及电化学嵌锂性能

任晓宁,梁静,陶占良,陈军   

  1. 南开大学新能源材料化学研究所, 先进能源材料化学教育部重点实验室, 天津 300071
  • 收稿日期:2010-10-15 修回日期:2010-11-29 出版日期:2011-03-10 发布日期:2011-02-23
  • 通讯作者: 陈军 E-mail:chenabc@nankai.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:   21076108)、 教育部创新团队基金(批准号:   IRT0927)和天津市应用基础及前沿技术研究项目(批准号:   08JCZDJC21300, 10JCYBJC08400)资助.

Hydrothermal Synthesis and Electrochemical Lithium Storage Performance of Flower-like NH4V4O10 Micro/Nano Structures

REN Xiao-Ning, LIANG Jing, TAO Zhan-Liang, CHEN Jun*   

  1. Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin 300071,  China
  • Received:2010-10-15 Revised:2010-11-29 Online:2011-03-10 Published:2011-02-23
  • Contact: CHEN Jun E-mail:chenabc@nankai.edu.cn
  • Supported by:

    国家自然科学基金(批准号:   21076108)、 教育部创新团队基金(批准号:   IRT0927)和天津市应用基础及前沿技术研究项目(批准号:   08JCZDJC21300, 10JCYBJC08400)资助.

摘要: 通过水热法制备了花状NH4V4O10微纳米结构. 采用XRD,SEM,TEM,XPS等测试手段对样品结构、形貌和组成进行了表征. 实验结果表明,所制得的NH4V4O10花状结构是由直径约100 nm,长度为几微米的纳米带团簇而形成. 研究了反应体系中温度、时间等因素对NH4V4O10产物形貌的影响. 将制备的NH4V4O10组装成锂模拟扣式电池,考察了其电化学嵌锂性能. 研究结果显示,所制备的花状NH4V4O10具有较高的比容量(307 mAh?g-1),有望作为锂离子电池的新型正极材料.  

关键词: 水热合成, NH4V4O10, 电化学

Abstract: Flower-like NH4V4O10 micro/nano structures have been prepared via a template-free hydrothermal route. The structure, morphology and composition of the as-synthesized products are characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) measurements. The diameter and length of the “petal” of the as-synthesized flower-like NH4V4O10 are about 100 nm and several microns, respectively. Effects of hydrothermal reaction parameters are also investigated,such as the reaction temperature and dwell time on the structure and morphology of the products. The electrochemical lithium storage of the as-synthesized products is also investigated. The experimental results show that the flower-like NH4V4O10 micro/nano structures exhibit high discharge specific capacity of 307 mAh?g-1, indicating their promising application as cathode materials for lithium-ion batteries.

Key words: Hydrothermal synthesis, NH4V4O10, Electrochemistry

中图分类号: 

TrendMD: