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- Title
Porous Si@SiO<sub>x</sub>@N‐Rich Carbon Nanofibers as Anode in Lithium‐Ion Batteries under High Temperature.
- Authors
Xia, Qi; Xu, Anding; Huang, Chuyun; Yan, Yurong; Wu, Songping
- Abstract
A facile electrospinning technique followed by pre‐oxidation and carbonization treatment is adopted to synthesize silicon anode cladded with SiOx layer and N‐rich carbon nanofibers (Si@SiOx@NCNFs), in which post‐used polyacrylonitrile (PAN) yarn is chosen as single carbon source. As anode in Li‐ion batteries, elaborately designed Si@SiOx@NCNFs renders remarkable reversible capacities of 1045 mA h g−1 at the 500th cycle under a current density of 8 A g−1 at 80°C, and 828 mA h g−1 after subsequent 500 cycles at 15 A g−1, mainly ascribed to the distinct hierarchical structure, N‐rich nature and enhanced pesudocapacitive behavior. When Si@SiOx@NCNFs is matched with commercial cathode LiFePO4, full cell delivers a stable capacity of 140 mA h g−1 at 100 mA g−1, accompanying with an energy density of 455 Wh kg−1 at 50 °C. These conspicuous features undoubtedly enable Si@SiOx@NCNFs to be promising anode materials for high‐power lithium‐ion battery used in harsh conditions.
- Subjects
LITHIUM-ion batteries; HIGH temperatures; ENERGY density; CARBON nanofibers; ANODES; DENSITY currents; CARBONIZATION
- Publication
ChemElectroChem, 2019, Vol 6, Issue 17, p4402
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.201901111