Abstract Hierarchical nano structures in mixed metal vanadates are more considerable due to their distinguished performance in energy storage and energy conversion devices. A template-free polyvinyl pyrrolidone (PVP) abetted hydrothermal technique is instigated successfully to attain mesoporous hierarchical nano-flowers (HNF) of Zn2VO4. The electrochemical properties of synthesized Zn2VO4 as an anode material for Li-ion batteries are focus of study for the first time. Both vanadium and zinc are comparatively economical, earth abundant and have wide range of redox reactions, which are promising for energy storage systems. As-synthesized HNF of Zn2VO4 has good surface area of 30.2515 m2g-1 and shows a high reversible capacity of 527.6 mAgh−1 up to 300 cycles at a current density of 0.3 A g−1. As-prepared electrode is also tending to be stable for long cycling (500 cycles) at current densities 0.5 and 1 A g−1. Morphology may attribute to increase the Li+ intercalation and a short path for the transportation of electrons and Li+, which lead to high reversible capacity and enhanced rate capability. Our reported results indicate that pristine Zn2VO4 is a credible applicant to be used as an anode in lithium ion batteries.

中文翻译：

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用于锂离子电池高容量负极的 Zn2VO4 分层介孔纳米花

摘要 混合金属钒酸盐中的多级纳米结构因其在储能和能量转换装置中的卓越性能而更为重要。一种无模板的聚乙烯吡咯烷酮（PVP）诱导的水热技术成功地获得了Zn2VO4的介孔分层纳米花（HNF）。合成的 Zn2VO4 作为锂离子电池负极材料的电化学性能首次成为研究的焦点。钒和锌都比较经济，地球资源丰富，氧化还原反应范围广，在储能系统中很有前景。Zn2VO4 合成后的 HNF 具有 30.2515 m2g-1 的良好表面积，并在 0.3 A g-1 的电流密度下最多 300 次循环显示出 527.6 mAgh-1 的高可逆容量。在电流密度为 0.5 和 1 A g-1 时，所制备的电极对于长循环（500 次循环）也趋于稳定。形态可能归因于增加 Li+ 的嵌入和电子和 Li+ 传输的短路径，从而导致高可逆容量和增强的倍率能力。我们报告的结果表明，原始的 Zn2VO4 是可用作锂离子电池负极的可靠材料。