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Enhanced Imaging of Lithium Ion Battery Electrode Materials

2016; Institute of Physics; Volume: 164; Issue: 1 Linguagem: Inglês

10.1149/2.0061701jes

1945-7111

Moshiel Biton, Vladimir Yufit, Farid Tariq, Masashi Kishimoto, Nigel P. Brandon,

Electron and X-Ray Spectroscopy Techniques

In this study we present a novel method of lithium ion battery electrode sample preparation with a new type of epoxy impregnation, brominated (Br) epoxy, which is introduced here for the first time for this purpose and found suitable for focused ion beam scanning electron microscope (FIB-SEM) tomography. The Br epoxy improves image contrast, which enables higher FIB-SEM resolution (3D imaging), which is amongst the highest ever reported for composite LFP cathodes using FIB-SEM. In turn it means that the particles are well defined and the size distribution of each phase can be analyzed accurately from the complex 3D electrode microstructure using advanced quantification algorithms.