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首页> 外文期刊>International Journal of Electrochemical Science >Synthesis and Electrochemical Properties of Flower-like Na- doped V6O13 Cathode Materials for Li-ion Batteries
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Synthesis and Electrochemical Properties of Flower-like Na- doped V6O13 Cathode Materials for Li-ion Batteries

机译：锂离子电池的花样Na-掺杂V 6 O 13 阴极材料的合成和电化学性能

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摘要

Flower-like NaxV6O13 samples (x=0~0.535) are fabricated via a typical hydrothermal method followedby annealed process at 350°C for 1h in argon atmosphere. The phase structure, chemical composition,morphology and element valence of prepared samples are characterized by XRD, XPS, FESEM andEDS. The electrochemical properties of prepared samples are measured by CV, EIS and chargedischarge analyses. These results demonstrates that the enhancement of electrochemical reversibility inNa-doped V6O13 cathode materials are attributed to its high total conductivity, low charge transferresistance and better electrochemical reversibility. In addition, both crystal domain size and the lithiumdiffusion coefficient of the Na-doped V6O13 samples are influenced by the added amount of NaNO3.When the doped molar ratio of Na+ to V6O13 is 0.321/1, the product presents hierarchical flower-likemicrosphere morphologies, which is assembled by interconnected nanorods. It demonstrates the bestelectrochemical performance with initial discharge capacity of 422.47mA·h/g. After 100cycles, thedischarge capacity and capacity retention of Na0.321V6O13 are 215.30mA·h/g and 51% respectively.
机译：通过在350℃下在氩气氛中在350℃下进行退火的方法，通过典型的水热法制造花样的NaxV6O13样品（x = 0〜0.535）。制备样品的相结构，化学成分，形态学和元素价为XRD，XPS，FESEM ands的特征。制备样品的电化学性质通过CV，EIS和Chardicischarge分析测量。这些结果表明，电化学可逆性的增强Inna掺杂的V6O13阴极材料归因于其高总电导率，低电荷转移性和更好的电化学可逆性。此外，晶体畴尺寸和Na-掺杂的V6O13样品的锂抗区系数受到纳米3的添加量的影响。当Na +至V6O13的掺杂摩尔比为0.321 / 1时，该产品呈现了分层花迷幻形态，由互连的纳米棒组装。它展示了最佳的电化学性能，初始放电容量为422.47mA·h / g。在100循环之后，Na0.321V6O13的分次容量和容量保留分别为215.30mA·h / g和51％。

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