花状NH4V4O10微纳米结构的水热制备及电化学嵌锂性能

通过水热法制备了花状NH4V4O10微纳米结构.采用XRD,SEM,,TEM和XPS等手段对样品的结构、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构成.研究了反应体系中温度和时间等因素对NH4V4O10形貌的影响.将制备的NH4V4O10组装成锂...

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

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.