碳纳米管导电纸集流体对三元锂离子电池的影响  

Effect of Carbon Nanotube Conductive Paper Collector on the Performance of Ternary Materials Lithium-ion Battery

作　　者：陈珑[1] 孙晓刚[1] 吴小勇[1] 邱治文[1] 蔡满园[1] 

机构地区：[1]南昌大学机电工程学院,南昌330031

出　　处：《材料导报（纳米与新材料专辑）》2016年第2期41-44,48,共5页

基　　金：江西省科技厅科研项目(20142BBE50071);江西省教育厅(KJLD13006)

摘　　要：以碳纳米管导体、纤维素纤维为基体制备碳纳米管导电纸。以此碳纳米管纸为集流体替代铝箔作为集流体组装纽扣电池。三元材料(NMC)为正极活性材料,制成浆料涂敷在碳纳米管纸表面制备成正极。利用Raman光谱、透射电子显微镜(TEM)、扫描电子显微镜(SEM)等进行结构和性能表征。通过恒流充放电检测电化学性能。结果表明:碳纳米管导电纸代替铝箔作集流体,具有更好的电化学性能。在0.1C倍率时,三元/导电纸电极首次放电容量达到184mAh/g,三元/铝箔电极为178mAh/g,相比后者,前者提高了3%,在28次循环后,容量保持率在94%以上。A carbon nanotube paper which was composited by carbon nanotubes and paper fiber was used as e- lectrical conductive additive and the paper fiber was used as matri~ The papers were used to replace aluminum foil for cathode current collector which were assembled in a glove box filled with argon gas. The NCM was coated on the con- ductive paper to prepare the postive electrode. The structure and properties are characterized by Raman spectroscopy, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）. The electrochemical performance is tested by cell tester （CT-3008W-SV5mA-S4）. Results show that carbon nanotube papers perform better than alumi- num foil. The first discharge specific capacity of NCM/ CNT paper electrode reached 184 mAh/g. The capacity in- crease by 3% compared with 178 mAh/g for NCM/ aluminum foil electrode. The capacity retention rate hold more than 94% after 28 cycles.

关 键 词：碳纳米管 碳纳米管导电纸 铝箔 三元材料 界面 

分 类 号：TM912.9[电气工程—电力电子与电力传动]