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Anisotropic crystallite size distributions in LiFePO(4) powders

The anisotropic crystallite sizes in high-performance LiFePO(4) powders were measured by XRD and compared with the particle sizes found by TEM image analysis. Lognormal particle size distribution functions were determined for all three main crystallographic axes. A procedure was developed to determi...

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Detalles Bibliográficos
Autores principales: Bobyl, Alexander, Kasatkin, Igor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8697584/
https://www.ncbi.nlm.nih.gov/pubmed/35423931
http://dx.doi.org/10.1039/d1ra02102h
Descripción
Sumario:The anisotropic crystallite sizes in high-performance LiFePO(4) powders were measured by XRD and compared with the particle sizes found by TEM image analysis. Lognormal particle size distribution functions were determined for all three main crystallographic axes. A procedure was developed to determine the fraction of the composite particles which consists of several crystallites and contains small- and large-angle boundaries. In a sample with the most anisotropic crystallites (ratio of volume-weighted mean crystallite sizes L̄(V[001])/L̄(V[010]) = 1.41) the number of the composite particles was at least 30%.