碳纳米纤维作为电动汽车电池负极材料的研究

Research on Carbon Nanofibers as Anode Materials of Batteries for Electric Car

当前我国大力发展新能源电动汽车,开发高效的锂离子动力电池技术是至关重要的一环。采用简易的方法合成了硼掺杂多孔碳纳米纤维作为锂离子电池的负极材料,表现出优异的电化学性能;该电极材料在100mAg^(-1)条件下首次充电比容量达到1450 m Ahg^(-1)的比容量,且120次循环后仍保持1300 m Ahg^(-1)的比容量,甚至在500 m Ag^(-1)电流密度下,800次循环后仍有390 m Ahg^(-1)的比容量。该结构的硼掺杂多孔碳纳米纤维具有很大潜力,可以作为下一代动力锂离子电池的负极材料,且大规模应用。

The development of new energy electric vehicles has been very fast in recent years, and development of efficient lithium ion power battery technology is a key step. In this paper, we prepared boron doped porous carbon nanofibers as lithium ion battery anode material by convenient and scalable strategy, showing excellent electrochemical peffomlance. The B - CNFs delivered a reversible charge capacity about 1450 mAhg^ - 1 and after 120 cycles at 50 mAg^-1 Even cycled at the cmfent density of 500 mAg^-1 , it still displays a very high capacity of about 390 mAhg^-1 Therefore, the unique structure of the boron doped porous carbon nanofibers has great potential to be the next generation commercial anode materials of power lithium ion battery with possibility of large - scale application.