Journal
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume 663, Issue 1, Pages 158-167Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15421406.2018.1470709
Keywords
AES; cycling time; graphite; Li ion battery; negative electrode; SEM; solid electrolyte interphase (SEI); ToF-SIMS; XPS
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This article investigates the characterization of the solid electrolyte interphase (SEI) on the graphite electrode after long cycling times. The chemical composition, molecular structure, and thickness of SEI layer on graphite electrode are characterized by using scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), auger electron spectroscopy (AES), and time of flight-secondary ion mass spectrometry (ToF-SIMS) with respect to cycling times. In particular, we focus the changes in the properties of SEI layer on the graphite electrode surface between initial-state (after 1 cycle) and aged-state (after 500 cycles). More detailed properties of SEI layer after long cycling times are systematically studied by XPS, AES, and ToF-SIMS.
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