Actions for Study of Mn dissolution from LiMn{sub 2}O{sub 4} spinel electrodes using rotating ring-disk collection experiments [electronic resource].

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Study of Mn dissolution from LiMn{sub 2}O{sub 4} spinel electrodes using rotating ring-disk collection experiments [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
7 pages : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The goal of this research was to measure Mn dissolution from a thin porous spinel LiMn₂O₄ electrode by rotating ring-disk collection experiments. The amount of Mn dissolution from the spinel LiMn₂O₄ electrode under various conditions was detected by potential step chronoamperometry. The concentration of dissolved Mn was found to increase with increasing cycle numbers and elevated temperature. The dissolved Mn was not dependent on disk rotation speed, which indicated that the Mn dissolution from the disk was under reaction control. The in situ monitoring of Mn dissolution from the spinel was carried out under various conditions. The ring currents exhibited maxima corresponding to the end-of-charge (EOC) and end-of-discharge (EOD), with the largest peak at EOC. The results suggest that the dissolution of Mn from spinel LiMn₂O₄ occurs during charge/discharge cycling, especially in a charged state (at >4.1 V) and in a discharged state (at <3.1 V). The largest peak at EOC demonstrated that Mn dissolution took place mainly at the top of charge. At elevated temperatures, the ring cathodic currents were larger due to the increase of Mn dissolution rate.
Report Numbers
E 1.99:lbnl--53533
lbnl--53533
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Note
Published through SciTech Connect.
07/01/2003.
"lbnl--53533"
Journal of The Electrochemical Society 150 7 FT
Striebel, Kathryn A.; Wang, Li-Fang; Chen, Jenn-Shing; Ou, Chin-Ching.
Funding Information
AC03-76SF00098
674501
View MARC record | catkey: 14447518