FTIR Spectroscopy of Metal Oxide Insertion Electrodes: A New Diagnostic Tool for Analysis of Capacity Fading in Secondary Cells
Autor: | Elton J. Cairns, L. Ma, Thomas J. Richardson, S.J. Wen, P. N. Boss, K. A. Striebel |
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Rok vydání: | 1996 |
Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Spinel Analytical chemistry Oxide Infrared spectroscopy chemistry.chemical_element Manganese Electrolyte engineering.material Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Electrode Materials Chemistry Electrochemistry engineering Fourier transform infrared spectroscopy Dissolution |
Zdroj: | Journal of The Electrochemical Society. 143:L136-L138 |
ISSN: | 1945-7111 0013-4651 |
DOI: | 10.1149/1.1836902 |
Popis: | Fourier transform infrared spectroscopy (FTIR) has been applied to the study of oxide insertion compounds used in rechargeable lithium batteries. The mechanisms responsible for capacity fading during normal cycling of LiMn 2 O 4 cells in both the 3 and 4 V regions were determined by examination of spectra obtained from electrodes following 25 cycles at charge and discharge rates of C/6. In the 3 V region, electroactive material becomes electronically disconnected from the rest of the electrode due to fracture of the oxide particles and/or expansion and contraction of the active material during the cubic-to-tetragonal phase transformation. In the upper voltage region, the active electrode material is gradually converted to a lower voltage defect spinel phase via dissolution of manganese in the electrolyte. |
Databáze: | OpenAIRE |
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