Sharma, Yogesh ; Sharma, N. ; Subba Rao, G. V. ; Chowdari, B. V. R. (2008) Li-storage and cyclability of urea combustion derived ZnFe2O4 as anode for Li-ion batteries Electrochimica Acta, 53 (5). pp. 2380-2385. ISSN 0013-4686
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.electacta.2007.09.059
Abstract
The cubic ZnFe2O4 with the spinel structure is prepared by the urea combustion method. Powder X-ray diffraction and HR-TEM studies confirm the single-phase nature with particle size in the range, 100-300 nm. A stable and reversible capacity, 615(±10) mAh g−1 (5.5 moles of Li per mole of ZnFe2O4) when cycled in the range, 0.005-3.0 V vs. Li at a current of 60 mA g−1(0.1C) has been achieved between 15 and 50 cycles. The underlying reaction mechanism contributing to the observed capacity is the combination of 'de-alloying-alloying' and 'conversion' reactions of 'LiZn-Fe-Li2O composite'. Ex situ HR-TEM and SAED data on the charged-electrode confirmed the proposed reaction mechanism.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | ZnFe2O4; Spinel Structure; Anode Material; Li-ion Batteries; Li-storage |
| ID Code: | 52056 |
| Deposited On: | 02 Aug 2011 08:24 |
| Last Modified: | 02 Aug 2011 08:24 |
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