A new approach to surface properties of solid electrolyte interphase on a graphite negative electrode

• Published in: Journal of power sources Vol. 247; pp. 307 - 313
• Main Authors: LEE, Seon-Hong, YOU, Ho-Gon, HAN, Kyu-Suk, KIM, Jake, JUNG, In-Ho, SONG, Joo-Han
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 01.02.2014
• Subjects: Acceleration; Applied sciences; Direct energy conversion and energy accumulation; Electric potential; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrodes; Exact sciences and technology; Interphase; Materials; Morphology; Solid electrolytes; Voltage; X-ray photoelectron spectroscopy; Lithium ion batteries; Monte Carlo method; Lithium-ion battery; Solid electrolyte interface; Anode; Low acceleration voltage; Solid electrolyte; Theoretical study; Electrode electrolyte interface; Secondary cell; Electrode material; Surface treatment; Low voltage; Ion etching; Solid electrolyte interphase; Graphite; Surface properties; Numerical simulation; Acceleration; Monte Carlo simulation
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.08.105

A new method for observing the outermost surface morphology and the thickness of solid electrolyte interphase (SEI) are presented. Low acceleration voltage in extreme high resolution scanning electron microscopy (XHR-SEM) provides detailed information on the SEI surface morphology due to secondary electron contrast mechanism. Also, XHR-SEM under low acceleration voltage with low energy induced ion etching in x-ray photoelectron spectroscopy (XPS) studies provides valuable information on the SEI layer thickness. More detailed properties of the SEI layer were investigated by transmission electron microscopy (TEM).