CRYSTALLITE AND PARTICLE SIZE ANALYSIS OF SI ANODE WITH XRD

Introduction

Si anode material is expected to be a high-capacity material. Nanoparticle formation of Si anode material is being studied to suppress the severe volume expansion that occurs during the discharge/charge process. While there are several analytical methods for the measurement of particle size, SAXS is particularly good for the analysis of nanoparticles. The particle size of Si anode material was calculated to be 39 nm by SAXS. In addition, its crystallite size, calculated by the FP method from its XRD profile, was calculated to be 40 nm. The Si anode material used for this analysis can be regarded as single-particle because the particle size was almost the same as the crystallite size.

Analysis results of particle and crystallite sizes of Si anode by FP method and SAXS

Particle and crystallite size distributions of Si anode calculated by FP method and SAXS