Silicon oxycarbide (SiOC) is considered as a potential anode material in lithium-ion batteries because of its high theoretical capacity and good structural stability. Despite many such assets, its low electronic conductivity causes poor rate capability and rapid attenuation of capacity. Herein, we report the fabrication of cowpea-like N-doped carbon nanofiber-encapsulated SiOC spheres (SiOC/C NFs) in which the Si−N bridging is introduced into SiOC. Our method not only demonstrates an improved electronic conductivity and a shortened ionic diffusion distance but also prevents agglomeration by avoiding direct contact with the electrolyte. As anode materials for lithium-ion batteries, this SiOC/C NF material delivers a high reversible capacity (707 mA h g −1 at 0.1 A g −1 after 100 cycles), a good rate performance (468 mA h g −1 at 1.6 A g −1 ), and an excellent cycling stability (570 mA h g −1 at 0.4 A g −1 after 800 cycles). Moreover, the full cell of LiFePO 4 // SiOC/C NFs exhibits excellent electrochemical properties, which demonstrates its prospect of great potential as an anode material for high-performance lithium-ion batteries.

No abstract

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

No abstract

No abstract