Anisotropic crystallite size distributions in LiFePO4 powders

Alexander Bobyl; Igor Kasatkin

doi:10.1039/D1RA02102H

Anisotropic crystallite size distributions in LiFePO₄ powders†

Alexander Bobyl

*^a and Igor Kasatkin

Author affiliations

* Corresponding authors

^a Ioffe Institute, Politekhnicheskaya ul. 26, St. Petersburg, Russia
E-mail: bobyl@theory.ioffe.ru

^b St. Petersburg State University, Universitetskaya nab. 7–9, St. Petersburg, Russia

Abstract

The anisotropic crystallite sizes in high-performance LiFePO₄ 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 [L with combining macron] _V[001]/_V[010] = 1.41) the number of the composite particles was at least 30%.

This article is part of the themed collection: 2021 RSC Advances HOT Article Collection

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Article information

DOI: https://doi.org/10.1039/D1RA02102H
Article type: Paper
Submitted: 17 Mar 2021
Accepted: 01 Apr 2021
First published: 13 Apr 2021
This article is Open Access

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RSC Adv., 2021,11, 13799-13805

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Anisotropic crystallite size distributions in LiFePO₄ powders

A. Bobyl and I. Kasatkin, RSC Adv., 2021, 11, 13799 DOI: 10.1039/D1RA02102H

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