Lithium extraction-insertion from/into LiCoPO4 in aqueous batteries
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Date
2011-02-16
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
A novel 1 V battery composed of Sn−LiCoPO4 using aqueous lithium hydroxide electrolyte is described. Reversible extraction and insertion of lithium from and into the olivine-type LiCoPO4 is reported. The electrochemical behavior of the Sn−LiCoPO4 battery was analyzed using charge/discharge cycling and cyclic voltammetry. Sn−LiCoPO4 battery exhibited charge/discharge voltages of 1.3 V/0.8 V versus Sn with a reversible capacity of 80 mAh/g. The structural and morphological changes of LiCoPO4 particles before and after electrochemical measurements were investigated by X-ray diffraction (XRD) and transmission electron microscopy. XRD data showed that extraction of lithium proceeds via at least a two-phase mechanism with LiCoPO4 and CoPO4 phases. Upon lithium reinsertion crystalline LiCoPO4 was formed. The cell voltage indicated these batteries were not completely charged, forming single-phase CoPO4 material. Energy-dispersive X-ray analysis coupled with transmission electron microscopy confirmed the chemical quality of the charged and discharged LiCoPO4 in terms of crystallinity and elemental distribution. © 2011, American Chemical Society
Description
Keywords
X-ray diffraction, Lithium, Transmission electron microscopy, Voltametry, Silicate minerals, Olivine
Citation
Minakshi, M., Singh, P., Sharma, N., Blackford, M., & Ionescu, M. (2011). Lithium extraction-insertion from/into LiCoPO4 in aqueous batteries. Industrial & Engineering Chemistry Research, 50(4), 1899-1905. doi:10.1021/ie102267x