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首页> 外文期刊>International Journal of Electrochemical Science >Effects of Carbon Coating on the Structure, Morphology and Electrochemical Performance of Li3V2(PO4)3 Cathode Material Prepared by Solid State Method
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Effects of Carbon Coating on the Structure, Morphology and Electrochemical Performance of Li3V2(PO4)3 Cathode Material Prepared by Solid State Method

机译：碳膜对Li 3 V 2 （PO 4 ） 3 的结构，形貌和电化学性能的影响固态法制备阴极材料

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摘要

Li3V2(PO4)3/C cathode material was prepared by a solid-state method with sucrose as carbon source.The effects of carbon coating on the structure, morphology and electrochemical performance ofLi3V2(PO4)3 were investigated. Both the pristine and the carbon coated materials were characterized byX-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electroscopy (TEM) andelectrochemical tests. Both samples have similar XRD patterns without extra reflections, whichindicates that carbon coating doesn affect the structure of Li3V2(PO4)3. SEM and TEM imagesconfirm that a thin carbon layer is formed on the surface of the Li3V2(PO4)3 particles. Electrochemicaltesting results reveals that Li3V2(PO4)3/C has better rate capability and higher discharge capacity thanthe pristine Li3V2(PO4)3. Indicated by the EIS results, the improvements can be attributed to theincreased conductivity and charge transfer capability induced by carbon coating.
机译：以蔗糖为碳源，通过固态法制备了Li3V2（PO4）3 / C正极材料。研究了碳包覆对Li3V2（PO4）3的结构，形貌和电化学性能的影响。原始材料和碳涂层材料均通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电镜（TEM）和电化学测试进行了表征。两种样品都具有相似的XRD图案，没有额外的反射，这表明碳涂层不会影响Li3V2（PO4）3的结构。 SEM和TEM图像确认在Li3V2（PO4）3颗粒的表面上形成了一层薄的碳层。电化学测试结果表明，Li3V2（PO4）3 / C比原始的Li3V2（PO4）3具有更好的倍率能力和更高的放电容量。 EIS结果表明，这种改进可归因于碳涂层引起的电导率和电荷转移能力的提高。

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