Self-evaporating from inside to outside to construct cobalt oxide nanoparticles-embedded nitrogen-doped porous carbon nanofibers for high-performance lithium ion batteries

摘要

Highlights?The nitrogen-doped composites are synthesized.?The self-evaporation of zinc precursor from inside to outside can by used.?They exhibit a high reversible capacity and an outstanding rate performance.AbstractThe nitrogen-doped porous carbon nanofibers decorated with CoxOynanoparticles (NPCF) have been synthesized by a facile electrospun method followed by calcination at 950?°C in N2. It is interesting that the self-evaporation of zinc precursor from inside to outside can form the stable pore channels frame structure inside the carbon composites, which can be beneficial to the migration of the ion. Moreover, the pore channels density can be controlled by varying the amount of zinc nitrate. When the NPCF applied as anode materials, it exhibits a high reversible capacity of 983.5?mAh?g?1after 400 cycles at 1000?mA?g?1. And it also deliveries an outstanding rate performance, which can be stabilized at ?1488, ?1172, ?957.5, and ?802.4?mAh?g?1when increasing the discharge/charge current density to 100, 300, 600, 1200?mA?g?1, respectively.]]>