Electrospun and carbonized 3D nanofiber mats coated with olivine structured lithium cobalt phosphate (LiCoPO4) were formed by a Pechini-assisted sol-gel process as cathode material for lithium ion batteries. 3D nonwoven nanofibers were soaked in aqueous solution containing lithium, cobalt salts and phosphates at 80 °C for 2 h. Then, the composites were dried and annealed at 730 °C for 2 to 12 h in nitrogen atmosphere. Crystalline deposits were uniformly distributed on the carbon nanofiber surface. The "loading" of the cathode material on the 3D carbon nanofiber composites reached 300 wt%. The electrochemical measurements revealed the discharge specific capacity (measured at a discharge rate of 0.1 C and room temperature) reaching a maximum value of 46 mAh g-1 after annealing time t = 5 h.
Bibliographical noteFunding Information:
The authors thank the Deutsche Forschungsgemeinschaft (DFG) 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 .
- Cathode material
- Lithium cobalt phosphate
- Lithium ion battery
- Nonwoven carbon nanofibers
ASJC Scopus subject areas
- General Chemical Engineering