The characterization of carbon nanofiber 3D nonwovens, prepared by electrospinning process, coated with olivine structured lithium iron phosphate is reported. The LiFePO 4 as cathode material for lithium ion batteries was prepared by a Pechini-assisted reversed polyol process. The coating has been successfully performed on carbon nanofiber 3D nonwovens by soaking in aqueous solution containing lithium, iron salts and phosphates at 70 °C for 2-4 h. After drying-out, the composites were annealed at 600 °C for 5 h under nitrogen. The surface investigation of the prepared composites showed a uniform coating of the carbon nonwoven nanofibers as well as the formation of cauliflower-like crystalline structures which are uniformly distributed all over the surface area of the carbon nanofibers. The electrochemical measurements on the composites showed good performances delivering a discharge specific capacity of 156 mAhg -1 at a discharging rate of C/25 and 152 mAhg -1 at a discharging rate of C/10 at room temperature.
Bibliographical noteFunding Information:
The authors thank the Deutsche Forschungsgemeinschaft (DFG) (Project: PAK-177) and the Excellency Cluster Center of Smart Interfaces (CSI) for the financial support during this work. The DFG promote and support financially the publication of the scientific results obtained during the projects. YZ and ALY are also grateful for the partial support of their work by National Science Foundation through the Grant CBET-0966764.
ASJC Scopus subject areas
- General Physics and Astronomy