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Mn_2V_2O_7纳米棒的制备及电化学储锂性能研究 被引量:1

Synthesis and Electrochemical Lithiation Properties of Mn_2V_2O_7 Nanorods
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摘要 以NH4VO3和Mn CO3为原料,采用水热法制备了Mn2V2O7纳米棒,采用X射线衍射(XRD)及场发射扫描电子显微镜(FE-SEM)对样品的结构和形貌进行了表征,并对其反应机理进行了探讨。以Mn2V2O7纳米棒作为锂离子电池的负极材料,对其电化学储锂性能进行了初步研究。结果表明:Mn2V2O7纳米棒在50 m A/g条件下的首次放电比容量为962.4 m Ah/g,循环50周后其放电比容量可稳定在389.4 m Ah/g,显示出较好的循环性能。 Using NH_4VO_3 and MnCO_3 as raw materials, Mn_2V_2O_7 nanorods were fabricated by a simple hydrothermal method. The structure and morphologies of the as-prepared Mn_2V_2O_7 nanorods were characterized by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), and the formation mechanism of the nanorods were discussed. The electrochemical performance of the as- synthesized Mn_2V_2O_7 nanorods as anode materials for lithium-ion batteries was investigated by a galvanostatic charge-discharge method. The results show that the first discharge capacity at the current density of 50 mA/g is 962.4 mAh/g, and a reversible capacity of 389.4 mAh/g is still retained after 50 discharge-charge cycles, the as-synthesized Mn_2V_2O_7 nanorods exhibited high capacity and excellent cycle stability.
出处 《人工晶体学报》 EI CAS CSCD 北大核心 2015年第2期470-474,共5页 Journal of Synthetic Crystals
基金 国家自然科学基金(21303107) 河北省自然科学基金(B2014106056 B2010001946) 河北省高校百名优秀创新人才支持计划(BR2-264)
关键词 Mn_2V_2O_7 纳米棒 水热法 电化学性能 Mn_2V_2O_7 nanorod hydrothemal method electrochemical property
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