Suresh, P. ; Shukla, A. K. ; Munichandraiah, N. (2006) Characterization of Zn-and Fe-substituted LiMnO2 as cathode materials in Li-ion cells Journal of Power Sources, 161 (2). pp. 1307-1313. ISSN 0378-7753
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jpowsour.2006.06.098
Abstract
Layered LiMn1-xMxO2 (M = Zn or Fe) (0 ≤ x ≤ 0.3) samples are synthesized from the corresponding sodium analogues by an ion-exchange method using LiBr in n-hexanol at 160 ° C. The samples are subjected to physicochemical and electrochemical characterization. X-ray diffraction data indicate the formation of layered structures for the LiMn1-xZnxO2 samples up to x = 0.3 and for LiMn1-xFexO2 samples up to x = 0.2. Among these, LiMn0.95Zn0.05O2 and LiMn0.95Fe0.05O2 provide the highest capacity values of 180 and 193 mAh g-1, respectively. Both Zn- and Fe-substituted samples display good capacity retention up to 30 charge-discharge cycles. Electrochemical impedance spectroscopy and galvanostatic intermittent titration data corroborate the results obtained from cyclic volatmmetry and charge-discharge cycling.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Substituted LiMnO2; Lithium-ion Cells; Cyclic Voltammetry; Electrochemical Impedance Spectroscopy; Capacity |
| ID Code: | 81798 |
| Deposited On: | 07 Feb 2012 12:11 |
| Last Modified: | 07 Feb 2012 12:11 |
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