Boron and nitrogen double-doped carbon flower prepared by in-situ copolymerization as anode materials for lithium-ion batteries

摘要

The structural design and element regulation of the electrode materials is considered an effective strategy to improve the energy storage performance. In this paper, we developed a boron and nitrogen double-doped carbon flower by in-situ polymerization and high-temperature carbonization. As an anode electrode material for lithium-ion batteries, it shows a high first discharge capacity of 885.9 mA h g(-1), and still maintained 416 mA h g(-1) after 450 cycles. Furthermore, it exhibits excellent capacitance (182 mA h g(-1)) at the high current density (2 A g(-1)) and even after 3000 cycles. The unique flower structure reduces ion diffusion distance, and the boron and nitrogen atoms provide more active sites, which endow the boron and nitrogen double-doped carbon flower with the excellent electrochemical performance. Therefore, the in-situ polymerization is a good scheme to prepare heteroatom double-doped nanocarbon materials with the high energy capacity.