N-doped coaxial CNTs@α-Fe2O3@C nanofibers as anode material for high performance lithium ion battery

• 来源期刊: 能源化学
• 年，卷（期）: 2018,（5）
• 页码范围: 1453-1460
• 页数: 8页
• 语种: 英文

摘要

N-doped coaxial CNTs@α-Fe2O3@C nanofibers have been successfully synthesized according to a facile solvothermal/hydrothermal method.The obtained CNTs@α-Fe2O3@C nanofibers composites exhibited special three-dimensional (3-D) network structure,which endows they promising candidate for anode materials of lithium ion battery.The coaxial property of CNTs@α-Fe2O3@C nanofibers could significantly improve the cycling and rate performance owing to the acceleration of charge/electron transfer,improvement of conductivity,maintaining of structural integrity and inhibiting the aggregation.The α-Fe2O3 nanoparticles with small size and high percentage of N-doped amount could further improve the electrochemical performance.As for the CNT@α-Fe2O3@C nanofibers,the capacity presented a high value of 1255.4 mAh/g at 0.1 C,and retained at 1213.4 mAh/g after 60 cycles.Even at high rate of 5 C,the capacity still exhibited as high as 319 mAh/g.The results indicated that the synthesized N-doped coaxial CNTs@α-Fe2O3@C nanofibers exhibited high cycling and rate performance.