The effect of a metal-oxide coating on the cycling Behavior at 55 degrees C in orthorhombic LiMnO2 cathode materials
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- The effect of a metal-oxide coating on the cycling Behavior at 55 degrees C in orthorhombic LiMnO2 cathode materials
- Cho, Jaephil; Kim, TJ; Park, B
- STRUCTURAL STABILITY; SPINEL ELECTRODES; CAPACITY; LIMN2O4; IMPROVEMENT; LICOO2; CELLS
- Issue Date
- ELECTROCHEMICAL SOC INC
- JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.149, no.3, pp.A288 - A292
- 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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