Dimesso, L. ; Spanheimer, C. ; Jaegermann, W. ; Zhang, Y. ; Yarin, A. L. (2012)
LiFePO4 – 3D carbon nanofiber composites as cathode materials for Li-ions batteries.
In: Journal of Applied Physics, 111 (6)
doi: 10.1063/1.3693575
Article, Bibliographie
Abstract
The characterization of carbon nanofiber 3D nonwovens, prepared by electrospinning process, coated with olivine structured lithium iron phosphate is reported. The LiFePO4 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 degrees C for 2-4 h. After drying-out, the composites were annealed at 600 degrees 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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2012 |
| Creators: | Dimesso, L. ; Spanheimer, C. ; Jaegermann, W. ; Zhang, Y. ; Yarin, A. L. |
| Type of entry: | Bibliographie |
| Title: | LiFePO4 – 3D carbon nanofiber composites as cathode materials for Li-ions batteries |
| Language: | English |
| Date: | 15 March 2012 |
| Publisher: | American Institute of Physics Publishing |
| Journal or Publication Title: | Journal of Applied Physics |
| Volume of the journal: | 111 |
| Issue Number: | 6 |
| DOI: | 10.1063/1.3693575 |
| Abstract: | The characterization of carbon nanofiber 3D nonwovens, prepared by electrospinning process, coated with olivine structured lithium iron phosphate is reported. The LiFePO4 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 degrees C for 2-4 h. After drying-out, the composites were annealed at 600 degrees 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. |
| Uncontrolled Keywords: | Carbon, Lithium, Annealing, Electrodeposition, Composite Materials, Crystal structure, Electrochemistry, Electrodes, Lithium ion batteries, Surface structure |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Surface Science Zentrale Einrichtungen Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI) Exzellenzinitiative Exzellenzinitiative > Clusters of Excellence |
| Date Deposited: | 26 Nov 2013 09:51 |
| Last Modified: | 26 Mar 2015 20:39 |
| PPN: | |
| Funders: | 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. |
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