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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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The effect of a metal-oxide coating on the cycling Behavior at 55 degrees C in orthorhombic LiMnO2 cathode materials

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Title
The effect of a metal-oxide coating on the cycling Behavior at 55 degrees C in orthorhombic LiMnO2 cathode materials
Author
Cho, JaephilKim, TJPark, B
Keywords
STRUCTURAL STABILITY; SPINEL ELECTRODES; CAPACITY; LIMN2O4; IMPROVEMENT; LICOO2; CELLS
Issue Date
2002-03
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.149, no.3, pp.A288 - A292
Abstract
The structural stability of metal-oxide-coated orthorhombic LiMnO2 (o-LiMnO2) was characterized by its 55degreesC cycling behavior. Sol-gel coating of the metal oxides (Al2O3 and CoO), followed by heat-treatment at 400degreesC, leads to the formation of the solid-solution layer (LiMn1-xMxO2) with a concentration gradient of metal atoms at the particle surface. The specific capacity and cycle life at 55degreesC are influenced significantly by the metal-oxide coating. CoO-coated LiMnO2 exhibits an additional voltage plateau at the deep discharge (2 V), and has a higher capacity than Al2O3-coated electrode, although the capacity retention is inferior to the Al2O3-coated cathode.
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DOI
10.1149/1.1446870
ISSN
0013-4651
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ECHE_Journal Papers
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