钛酸锂石墨烯复合电极材料电化学行为

摘要本文的研究内容是钛酸锂/石墨烯复合电极材料的制备方法，合成工艺对电极材料的影响，以及钛酸锂/石墨烯复合电极材料的电化学表征。在钛酸锂/石墨烯复合电极材料的制备中，通过控制不同的Li/Ti比例，温度和气氛等工艺参数，制备一系列钛酸锂/石墨烯复合电极材料粉末。使用XRD、SEM、循环伏安法等分析手段对其进行分析表征。根据分析结果来优化合成钛酸锂/石墨烯复合电极材料工艺,并得到了一些规律：在制备钛酸锂时，LiOH过量5%有利于得到单一的钛酸锂；还原氛围下，煅烧温度为850℃时，制得的钛酸锂/石墨烯复合电极材料组成单一，电化学性能较好；最终制得的钛酸锂/石墨烯复合电极材料成分均匀，电化学性能优良。22228
毕业论文关键词：钛酸锂/石墨烯复合电极材料；高温固相合成；XRD；SEM
Abstract
Contents of this paper is a method for preparing lithium titanate/graphene composite electrode material,the impact on the electrode materials synthesis and electrochemical characterization of lithium titanate/graphene composite electrode materials.In the preparation of lithium titanate/graphene composite electrode material, a series of lithium titanate/graphene composite electrode material powder had been made by controlling the different process parameters Li/Ti ratio of temperature and atmosphere,etc.Use analytical tools XRD, SEM,cyclic voltammetry to analyze characterization.According to the analysis results to optimize the synthesis of lithium titanate/graphene composite electrode materials technology, and got some laws: the preparation of lithium titanate, LiOH to obtain 5% excess in favor of lithium titanate single;under reducing atmosphere, the calcination temperature is 850℃, the lithium titanate prepared/graphene composite electrode material to form a single, good electrochemical performance;Finally obtained lithium titanate/graphene composite electrode material composition uniformity, excellent electrochemical properties.
Key words:lithium titanate/graphene composite electrode material;high-tempera-
ture solid-phrase synthesis;XRD;SEM
目录
摘要    1
Abstract    1
绪论    4
   1.1引言    4
   1.2锂离子电池简介    4
      1.2.1锂离子电池的发展历史    4
      1.2.2锂离子电池的用途及原理    5
      1.2.3锂离子电池组成    6
      1.2.4正极材料    6
      1.2.5负极材料    7
      1.2.5电解液    7
      1.2.6隔膜    7
1.3锂离子电池负极材料Li4Ti5O12的研究概况    8
      1.3.1 Li4Ti5O12的晶体结构    8
      1.3.2 Li4Ti5O12的充放电机理    8
      1.3.3 主要制备方法    9
        （1）固相反应法    9
        （2）溶胶-凝胶法    9
1.4石墨烯材料在锂离子电池中的应用    10
      1.4.1石墨烯材料在锂离子电池中的作用    10
      1.4.2钛酸锂-石墨烯复合材料    10
1.5课题内容    10
      1.5.1课题研究的目的和意义    10
      1.5.2课题研究内容    11 钛酸锂石墨烯复合电极材料电化学行为:http://www.751com.cn/cailiao/lunwen_14762.html