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Nitrate-Melt Synthesized HT-LiCoO(2) as a Superior Cathode-Material for Lithium-Ion Batteries

An electrochemically-active high-temperature form of LiCoO(2) (HT-LiCoO(2)) is prepared by thermally decomposing its constituent metal-nitrates at 700 ºC. The synthetic conditions have been optimized to achieve improved performance with the HT-LiCoO(2) cathode in Li-ion batteries. For this purpose,...

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Detalles Bibliográficos
Autores principales: Sathiya, Mariyappan, Prakash, Annigere S., Ramesha, Kannadka, Shukla, Ashok K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5445747/
http://dx.doi.org/10.3390/ma2030857
Descripción
Sumario:An electrochemically-active high-temperature form of LiCoO(2) (HT-LiCoO(2)) is prepared by thermally decomposing its constituent metal-nitrates at 700 ºC. The synthetic conditions have been optimized to achieve improved performance with the HT-LiCoO(2) cathode in Li-ion batteries. For this purpose, the synthesized materials have been characterized by powder X-ray diffraction, scanning electron microscopy, and galvanostatic charge-discharge cycling. Cathodes comprising HT-LiCoO(2) exhibit a specific capacity of 140 mAhg(-1) with good capacity-retention over several charge-discharge cycles in the voltage range between 3.5 V and 4.2 V, and can sustain improved rate capability in contrast to a cathode constituting LiCoO(2) prepared by conventional ceramic method. The nitrate-melt-decomposition method is also found effective for synthesizing Mg-/Al- doped HT-LiCoO(2); these also are investigated as cathode materials for Li-ion batteries.