论文标题
LI3VO4/C复合材料作为锂离子电池的阳极材料的Sol-Gel合成
Sol-gel synthesis of Li3VO4/C composites as anode materials for lithium-ion batteries
论文作者
论文摘要
LI3VO4/C复合材料已通过Sol-Gel方法合成，并在N2流量中使用Tartaric Acid，Malic Acid或葡萄糖作为螯合剂和碳源在N2流量中进行了650°C后的通量。这些有机添加剂的存在至关重要地影响最终产物的形态和结晶石大小。发现LI3VO4/C作为锂离子电池（LIB）的阳极材料的电化学特性受材料的形态，质地和碳含量的影响。当使用羧酸作为具有介孔结构和高表面积的碳源复合材料时，将显示出增强的电化学活性。最初，可逆能力约为400 mAh g-1。相反，用葡萄糖合成的LI3VO4/C在循环稳定性方面均优于葡萄糖。 100个周期后，它表现出299 mAh G-1的排放能力，对应于96％的出色能力保留率。显示了碳复合材料对LI3VO4电化学性能的有利作用。
Li3VO4/C composites have been synthesized by a sol-gel method and post-annealing at 650 °C for 1 h in N2 flow using either tartaric acid, malic acid, or glucose as both chelating agents and carbon source. The presence of these organic additives crucially affects morphology and crystallite size of the final product. It is found that the electrochemical properties of Li3VO4/C as anode material for Li-ion batteries (LIBs) are influenced by the morphology, texture and carbon content of the material. When using carboxylic acids as carbon source composites with mesoporous structure and a high surface area are obtained that display an enhanced electrochemical activity. Initially, reversible capacity of about 400 mAh g-1 is obtained. In contrast, Li3VO4/C synthesized with glucose outperforms in terms of cycling stability. It exhibits a discharge capacity of 299 mAh g-1 after 100 cycles corresponding to an excellent capacity retention of 96 %. The favorable effect of carbon composites on the electrochemical performance of Li3VO4 is shown.
