An electrochemical investigation of Li intercalation in the sol-gel LiMn2O4 spinel oxide |
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Authors: | S Bach J Farcy J P Pereira-Ramos |
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Institution: | LECSO-CNRS UM 28, 2 rue Henri Dunant, 94320 Thiais, France |
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Abstract: | An alternative approach for obtaining the LiMn2O4 spinel phase is provided by the use of the sol-gel method in aqueous solution. The main electrochemical properties of the sol-gel LiMn2O4 phase are reported. In addition to chronopotentiometric and voltammetric experiments, the kinetics of the electrochemical insertion–extraction of lithium in LixMn2O4 (0.25<x<1) has been investigated using ac impedance spectroscopy. The strong variation of the chemical diffusion coefficient DLi vs x, in the range 10?8–10?11 cm2 s?1 (DLi is found to be maximum for x=0.55) is critically discussed. |
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Keywords: | Sol-Gel Manganese LiMn2O4 Lithium batteries |
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