Hashem, Ahmed M. ; Abdel-Latif, A. M. ; Abuzeid, Hanaa M. ; Abbas, H. M. ; Ehrenberg, Helmut ; Farag, R. S. ; Mauger, A. ; Julien, C. M. (2011)
Improvement of the electrochemical performance of nanosized α-MnO2 used as cathode material for Li-batteries by Sn-doping.
In: Journal of Alloys and Compounds, 509 (40)
doi: 10.1016/j.jallcom.2011.07.075
Article, Bibliographie
Abstract
Sn-doped MnO2 was prepared by hydrothermal reaction between KMnO4 as oxidant, fumaric acid C4H4O4 as reductant and SnCl2 as doping agent. XRD analysis indicates the cryptomelane α-MnO2 crystal structure for pure and doped samples. Thermal stabilization was observed for both oxides as detected from thermogravimetric analysis. SEM and TEM images show changes in the morphology of the materials from spherical-like particles for pristine P–MnO2 to rod-like structure for Sn–MnO2. Electrochemical properties of the electrode materials have been tested in lithium cells. Improvement in capacity retention and cycling ability is observed for doped oxide at the expense of initial capacity. After 35 cycles, the Li//Sn doped MnO2 cell display lower capacity loss.
| Item Type: | Article |
|---|---|
| Erschienen: | 2011 |
| Creators: | Hashem, Ahmed M. ; Abdel-Latif, A. M. ; Abuzeid, Hanaa M. ; Abbas, H. M. ; Ehrenberg, Helmut ; Farag, R. S. ; Mauger, A. ; Julien, C. M. |
| Type of entry: | Bibliographie |
| Title: | Improvement of the electrochemical performance of nanosized α-MnO2 used as cathode material for Li-batteries by Sn-doping |
| Language: | English |
| Date: | 6 October 2011 |
| Journal or Publication Title: | Journal of Alloys and Compounds |
| Volume of the journal: | 509 |
| Issue Number: | 40 |
| DOI: | 10.1016/j.jallcom.2011.07.075 |
| Abstract: | Sn-doped MnO2 was prepared by hydrothermal reaction between KMnO4 as oxidant, fumaric acid C4H4O4 as reductant and SnCl2 as doping agent. XRD analysis indicates the cryptomelane α-MnO2 crystal structure for pure and doped samples. Thermal stabilization was observed for both oxides as detected from thermogravimetric analysis. SEM and TEM images show changes in the morphology of the materials from spherical-like particles for pristine P–MnO2 to rod-like structure for Sn–MnO2. Electrochemical properties of the electrode materials have been tested in lithium cells. Improvement in capacity retention and cycling ability is observed for doped oxide at the expense of initial capacity. After 35 cycles, the Li//Sn doped MnO2 cell display lower capacity loss. |
| Uncontrolled Keywords: | Lithium ion batteries; Manganese dioxide; Tin doping; Cryptomelane |
| Additional Information: | SFB 595 B4 |
| Divisions: | DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B4: In situ investigations of the degradation of intercalation batteries and their modelling DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue Zentrale Einrichtungen DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio) |
| Date Deposited: | 15 Sep 2011 14:13 |
| Last Modified: | 05 Mar 2013 09:54 |
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