Facile Synthesis of ZnO Nanoparticles on Nitrogen-Doped Carbon Nanotubes as High-Performance Anode Material for Lithium-Ion Batteries

作者：Li, Haipeng; Liu, Zhengjun; Yang, Shuang; Zhao, Yan^*; Feng, Yuting; Bakenov, Zhumabay; Zhang, Chengwei^*; Yin, Fuxing

来源：Materials, 2017, 10(10): 1102.

DOI：10.3390/ma10101102

• lithium ion battery
• anode
• ZnO/nitrogen-doped carbon nanotube (ZnO/NCNT) composite
• highly-dispersed ZnO nanoparticles
• sol-gel

ZnO/nitrogen-doped carbon nanotube (ZnO/NCNT) composite, prepared though a simple one-step sol-gel synthetic technique, has been explored for the first time as an anode material. The as-prepared ZnO/NCNT nanocomposite preserves a good dispersity and homogeneity of the ZnO nanoparticles (similar to 6 nm) which deposited on the surface of NCNT. Transmission electron microscopy (TEM) reveals the formation of ZnO nanoparticles with an average size of 6 nm homogeneously deposited on the surface of NCNT. ZnO/NCNT composite, when evaluated as an anode for lithium-ion batteries (LIBs), exhibits remarkably enhanced cycling ability and rate capability compared with the ZnO/CNT counterpart. A relatively large reversible capacity of 1013 mAh<bold>g</bold>-1 is manifested at the second cycle and a capacity of 664 mAh<bold>g</bold>-1 is retained after 100 cycles. Furthermore, the ZnO/NCNT system displays a reversible capacity of 308 mAh<bold>g</bold>-1 even at a high current density of 1600 mA<bold>g</bold>-1. These electrochemical performance enhancements are ascribed to the reinforced accumulative effects of the well-dispersed ZnO nanoparticles and doping nitrogen atoms, which can not only suppress the volumetric expansion of ZnO nanoparticles during the cycling performance but also provide a highly conductive NCNT network for ZnO anode.

• 出版日期2017-10
• 单位河北工业大学