Detection of Li Deposition by Glow Discharge Optical Emission Spectroscopy in Post-Mortem Analysis. (9th July 2015)

• Record Type: Journal Article
• Authors: Ghanbari, Niloofar; Waldmann, Thomas; Kasper, Michael; Axmann, Peter; Wohlfahrt-Mehrens, Margret
• Is Part Of: ECS Electrochemistry Letters. Volume 4:Number 9(2015)
• Page Start: A100
• Page End: A102
• Publication Date: 2015-07-09
• Subjects: aging mechanisms -- degradation -- GD-OES depth profiling -- graphite anodes -- life-time -- lithium plating -- Litihium-ion Batteries -- Post-Mortem analysis
• DOI: 10.1149/2.0041509eel
• Languages: English
• ISSNs: 2162-8726

Abstract

Abstract : Glow discharge optical emission spectroscopy (GD-OES) is employed to detect and quantify Li deposition as a function of depth on graphite electrodes. Commercial cells with graphite anodes were subject to Li plating by being cycled at 5°C. A comparison is made with graphite electrodes with solid electrolyte interphase (SEI) after formation. Depth profiles of O, Li, and C show different surface effects in terms of thickness and Li content, with significantly higher Li concentration in the case of Li deposition.