微米级球状铝粉作为锂离子电池负极材料的改性研究  

Modification of Micronsized Aluminum Spherules as Anode Materials for Lithium Ion Batteries

作　　者：雷雪峰[1] 马军现[1] 钟辉新[1] 孙聚堂[2] 

机构地区：[1]电子科技大学中山学院化学与生物系,广东中山528402 [2]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《化学研究》2009年第3期69-73,共5页Chemical Research

基　　金：广东省自然科学基金项目(8452840301001692);电子科技大学中山学院科研启动基金项目(2007YKQ16);电子科技大学中山学院青年基金项目(407YJ01)

摘　　要：选用粒径为3μm的球状铝粉作为锂离子电池负极材料,采用小分子有机材料3,4,9,10-苝四酸酐作为改性剂,通过固相法在不同温度下合成两种Al-C复合材料,利用元素分析、XRD、SEM、粒度分布等手段对材料进行了表征,并通过恒流充放电测试对比了铝球和复合材料的电化学性能.通过改性,550℃和650℃下生成的复合材料的首次放电容量可分别高达990 mAh/g和738 mAh/g,与纯铝电极的首次放电容量相比(219 mAh/g)有了很大提高.其中,650℃下生成的复合材料表现出较好的循环性能.Two A1-C composites were synthesized through solid state method in different temperature, in which the aluminum spherules with particle size of 3 μm was used as matrix and 3,4,9,10-perylene-tetracarboxylic acid-dianhydride （PTCDA） was chosen as modifier. The composites were characterized by elemental analyses, particle size analysis, X-ray diffraction, scanning electron microscope and galvanostatic cycling. The electrochemical properties of pure Al and the composites were compared. Results show that the composites prepared at 550 and 650 ℃ possess the first discharge capacities of 990 and 738 mAh/g respectively, which are much higher than that of pure aluminum （219 mAh/g）. Among these, the composite prepared at 650 ℃ gives better cycle performance.

关 键 词：球状铝粉 锂离子电池 负极材料 改性 

分 类 号：O614.3[理学—无机化学]