锂离子电池用聚萘负极材料的制备及电化学性能

Preparation and Electrochemical Performance of Polyperinaphthalene Anode Material for Lithium Ion Battery

采用3,4,9,10-二萘嵌苯四酸二酐(PTCTA)为原料,经高温自由基聚合、气相沉积、脱氢、石墨化工艺制得锂离子电池用聚萘(PPN)负极材料。通过X射线衍射、扫描电子显微镜、激光显微拉曼光谱等检测技术对PPN负极材料的结构和表面形貌进行了分析与表征,研究了PPN作为锂离子电池负极材料的电化学行为。结果表明,PPN负极材料具有类似石墨的多片层结构,电化学测试表明,PPN负极材料具有良好的循环稳定性和倍率性能;在50mA/g电流密度下,PPN负极材料首次放电比容量为368.4mAh/g,经过200圈循环之后,PPN负极材料的放电比容量仍保持在300.3mAh/g。结果显示PPN适用于做锂离子电池负极材料。

Polyperinaphthalene(PPN)anode material for lithium ion battery was prepared by high temperature radical polymerization,vapor deposition,dehydrogenation and graphitization technology using 3,4,9,10-perylenetetracarboxylic dianhydride(PTCTA)as material.The physical structure performance was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and Raman techniques.The electrochemical performances of PPN as anode material of lithium ion battery were investigated.The results show that PPN has a kind of multi-lamellar structure similar to that of graphite.Constant current charge-discharge tests show that PPN anode materials have excellent cycling stability and rate capabilities,the PPN anode material delivers a initial discharge specific capacity of 368.4mAh/g at the current density of 50mA/g.After 200 cycles at the same current density,the discharge specific capacity remains at 300.3mAh/g.The results indicate that PPN is suitable for anode material of lithium ion battery.