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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Structural changes of LiMn2O4 spinel electrodes during electrochemical cycling

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Title
Structural changes of LiMn2O4 spinel electrodes during electrochemical cycling
Author
Cho, JaephilThackeray, MM
Keywords
MANGANESE-DIOXIDE; LITHIUM BATTERIES; LI/LIMN2O4 CELLS; CATHODE; TEMPERATURE; CARBONATES; DISCHARGE; INSERTION; PHASE
Issue Date
1999-10
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.146, no.10, pp.3577 - 3581
Abstract
Structural changes of LiMn2O4 spinel electrodes have been investigated in 4 V Li/LixMn2O4 cells by X-ray diffraction during prolonged electrochemical cycling between 4.5 and 3.4 V at room temperature. The capacity fade that is observed during cycling is attributed, at least partly, to disproportionation reactions at the particle surface of discharged LixMn2O4 electrodes, resulting in a soluble MnO component. The disproportionation reactions are described with respect to the Li-Mn-O phase diagram. The data support recent reports that Li2Mn2O4 can be formed at the electrode surface slightly above 3 V when cells are discharged and charged at high rates.
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DOI
10.1149/1.1392517
ISSN
0013-4651
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ECHE_Journal Papers
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