Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7735824 | Journal of Power Sources | 2014 | 8 Pages |
Abstract
Nanosized Prussian Blue, K0.88Fe2.04(CN)6·yH2O, prepared in aqueous solution at room temperature, is shown to be active as anode for lithium ion batteries after mild dehydration. It exhibits reversible capacities of up to 400 mAh gâ1 at 8.75 mA gâ1 and 150 mAh gâ1 at 1750 mA gâ1, with relatively low hysteresis and long cycle life in the low voltage range 0.005-1.6 V vs lithium. Ex-situ XRD, FTIR as well as SEM and TEM studies on pristine and cycled electrodes suggest that the reversible insertion of about â¼5 Li+/f.u. is associated with a displacement (or conversion) reaction on the Prussian Blue structure along with the reduction of all iron atoms, reported for the first time in this kind of systems. The products of re-oxidation do not recover the crystal structure of Prussian Blue.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Mª José Piernas-Muñoz, Elizabeth Castillo-MartÃnez, Vladimir Roddatis, Michel Armand, Teófilo Rojo,