题 目: 流变相反应法制备锂二次电池正极材料 Li V 3-xZnxO8 摘 要具有层状结构的 LiV3O8具有稳定的晶体结构、低成本、高比容量、丰富的原材料以及在空气中稳定存在等特性。因此,近 20 年来其作为二次锂离子电池正极材料的讨论受到了人们的广泛关注。本文中,采纳低温下流变相法掺杂 Zn 来合成正极材料 LiV1-xZnxO8,并对所合成材料的制备条件以及电化学性能进行讨论。其主要内容为:称取不同比例的 LiOH、NH4VO3和 Zn(CH3COOH)2进行研磨,然后加二次蒸馏水调和成流变相于反应釜内 80℃保湿 6小时之后干燥 12 小时。研磨后中不同的温度煅烧 10 小时即得所需产物。通过 XRD 测试表明通过流变相法成功制备了 LiV3-xZnxO8产物。实验表明 400℃温度下加热处理 10 小时得到的 LiV3-xZnxO8样品具有的首次放电容量达到 257.4 mAh/g,而且其循环性能优良,在经过 30 周循环以后,其比容量仍能达到 236.9 mAh/g。此结果说明与 LiV3O8相比,LiV3-xZnxO8中放电比容量和充电性能以及循环性能上表现出了良好的优越性,使得钒酸锂作为锂电池正极材料的性能得到了明显的改善。关键词:钒酸锂掺杂,流变相反应法,锂离子电池,正极材料Title Doped vanadium lithium rechargeable lithium battery cathode material AbstractLiV3O8 with layered structure LiV3O8 displays the characteristics stable crystal structure , low-cost, high- capacity, abundant raw materials and stability in the air. Therefore, for the past 20 years, it has been widespread concern as a rechargeable lithium ion battery cathode material. In this paper, the use of low temperature downstream phase method the doped Zn to synthesize the cathode material LiV1-xZnxO8 and the preparation conditions, and electrochemical properties of the synthesized materials research. Its main contents are: Weigh the different proportions of LiOH, NH4VO3 and Zn ( CH3COOH ) 2 grinding , Then add twice-distilled water to reconcile into a theological phase within the reactor 80℃ after 6 hours moisturizing dried for 12 hours . After calcined for 10 hours at differen...