Publications by authors named "Songyoot Kaewmala"
The Li- and Mn-rich layered oxide cathode material class is a promising cathode material type for high energy density lithium-ion batteries. However, this cathode material type suffers from layer to spinel structural transition during electrochemical cycling, resulting in energy density losses during repeated cycling. Thus, improving structural stability is an essential key for developing this cathode material family.
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- Layered-layered composite (xLiMnO·(1 -x) LiMO) cathodes are promising for high energy density lithium-ion batteries but face stability issues due to complex phase changes during cycling.
- The preparation methods greatly influence the structural characteristics and stability of these materials, making it essential to understand their relationship with multiscale structural properties.
- In this study, 0.5LiMnO·0.5LiCoO composites were created with varying heating and cooling rates, revealing that while these rates don't affect crystal or local atomic structures, they significantly impact the microstructure, which in turn influences electrochemical performance.
Lithium-rich layered oxide materials, xLi2MnO3·(1 - x)LiMO2 (M = Mn, Fe, Co, Ni, etc.), are a promising candidate for use as cathode materials in the batteries of electric vehicles (EVs). This is due to their high energy density (∼900 W h kg-1), which is larger than those of the currently used commercial cathode materials.
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- Lithium rich layered oxide xLiMnO∙(1-x)LiMO materials are being explored as effective cathode materials for advanced lithium-ion batteries, but their electrochemical behaviors are not well understood.
- This study investigates how different sizes of LiMnO domains in 0.5LiMnO∙0.5LiCoO materials affect phase separation and lithium ion transport kinetics.
- Findings show that smaller domain sizes initially enable better lithium ion movement, while larger domain sizes improve ion mobility over time by reducing structural changes and defects.
Layered-layered composite oxides of the form xLiMnO·(1-x) LiMO (M = Mn, Co, Ni) have received much attention as candidate cathode materials for lithium ion batteries due to their high specific capacity (>250mAh/g) and wide operating voltage range of 2.0-4.8 V.
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