Vibrational studies of spinel LixMn2O4 (0.3≤x≤1.0) cathodes |
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Authors: | C Julien C Perez-Vicente G A Nazri |
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Institution: | (1) Lab. de Physique des Solides, Université Pierre et Marie Curie, 75252 Paris Cedex 05, France;(2) Physical Chemistry Dept., GM R&D Center, 33900 Mount Road, 48090 Warren, MI, USA |
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Abstract: | We report on the vibrational properties of spinel LiMn2O4 and its electrochemically delithiated forms LixMn2O4. Raman scattering and infrared absorption spectra have been studied as a function of the delithiation content in the wavenumber
range 50–700 cm−1. Results show that lithium ions can be extracted at room temperature to obtain LixMn2]O4 (0.3≤x≤1.0) without disrupting the Mn2]O4 array. The normal modes of the spinel LiMn2O4 have been discussed in the O
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symmetry and vibrations due to lithium ions with their oxygen neighbors have been identified at ca. 400 cm−1.
Paper presented at the 3rd Euroconference on Solid State Ionics, Teulada, Sardinia, Italy, Sept. 15–22, 1996 |
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