Li, X. ; Wei, Y. J. ; Ehrenberg, Helmut ; Du, F. ; Wang, C. Z. ; Chen, G. (2008)
Characterizations on the structural and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 prepared by a wet-chemical process.
In: Solid State Ionics, 178 (39-40)
doi: 10.1016/j.ssi.2008.01.048
Article, Bibliographie
Abstract
LiNi1/3Mn1/3Co1/3O2 compounds were prepared at 700 (sample-A) and 900 °C (sample-B) by a simple wet-chemical process. X-ray diffraction showed the sample-A had a larger Li/Ni site exchange (9.9%) than that of the sample-B (4.4%). Raman scattering analysis suggests strong structural disorder within the octahedral [MO6] units due to different masses and bonding of the M–O bonds, as well as the Li/Ni site exchange in the crystals. The weakening of the Eg band was correlated with the Li/Ni site exchange. XPS analysis indicates that a lower annealing temperature than 900 °C leads to the formation of oxygen deficient LiNi1/3Mn1/3Co1/3O2 − δ. The electrochemical properties of the materials were investigated by charge–discharge experiments and electrochemical impedance spectroscopy. The drastic capacity fading of the sample-A was attributed to its structural properties. The sample-B showed satisfying cycling performance. But the capacity fading in the potential region of 2.5–4.6 V was larger than that in 2.5–4.4 V, which was attributed to the large charge transfer resistance at potentials above 4.4 V.
| Item Type: | Article |
|---|---|
| Erschienen: | 2008 |
| Creators: | Li, X. ; Wei, Y. J. ; Ehrenberg, Helmut ; Du, F. ; Wang, C. Z. ; Chen, G. |
| Type of entry: | Bibliographie |
| Title: | Characterizations on the structural and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 prepared by a wet-chemical process |
| Language: | English |
| Date: | March 2008 |
| Journal or Publication Title: | Solid State Ionics |
| Volume of the journal: | 178 |
| Issue Number: | 39-40 |
| DOI: | 10.1016/j.ssi.2008.01.048 |
| Abstract: | LiNi1/3Mn1/3Co1/3O2 compounds were prepared at 700 (sample-A) and 900 °C (sample-B) by a simple wet-chemical process. X-ray diffraction showed the sample-A had a larger Li/Ni site exchange (9.9%) than that of the sample-B (4.4%). Raman scattering analysis suggests strong structural disorder within the octahedral [MO6] units due to different masses and bonding of the M–O bonds, as well as the Li/Ni site exchange in the crystals. The weakening of the Eg band was correlated with the Li/Ni site exchange. XPS analysis indicates that a lower annealing temperature than 900 °C leads to the formation of oxygen deficient LiNi1/3Mn1/3Co1/3O2 − δ. The electrochemical properties of the materials were investigated by charge–discharge experiments and electrochemical impedance spectroscopy. The drastic capacity fading of the sample-A was attributed to its structural properties. The sample-B showed satisfying cycling performance. But the capacity fading in the potential region of 2.5–4.6 V was larger than that in 2.5–4.4 V, which was attributed to the large charge transfer resistance at potentials above 4.4 V. |
| Uncontrolled Keywords: | Lithium–ion batteries; LiNi1/3Mn1/3Co1/3O2; X-ray diffraction; Raman scattering; Electrochemical properties |
| 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 Aug 2011 10:44 |
| Last Modified: | 05 Mar 2013 09:51 |
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