LiFePO 4 - 3D carbon nanofiber composites as cathode materials for Li-ions batteries

L. Dimesso, C. Spanheimer, W. Jaegermann, Y. Zhang, Alexander Yarin

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Abstract

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.

Original languageEnglish
Article number064307
JournalJournal of Applied Physics
Volume111
Issue number6
DOIs
Publication statusPublished - 2012 Mar 15
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Dimesso, L., Spanheimer, C., Jaegermann, W., Zhang, Y., & Yarin, A. (2012). LiFePO 4 - 3D carbon nanofiber composites as cathode materials for Li-ions batteries. Journal of Applied Physics, 111(6), [064307]. https://doi.org/10.1063/1.3693575