In Situ Raman Spectroscopy on Silicon Nanowire Anodes Integrated in Lithium Ion Batteries. Issue 3 (1st January 2019)

• Record Type: Journal Article
• Authors: Krause, Andreas; Tkacheva, Olga; Omar, Ahmad; Langklotz, Ulrike; Giebeler, Lars; Dörfler, Susanne; Fauth, F.; Mikolajick, Thomas; Weber, Walter M.
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 3(2019)
• Page Start: A5378
• Page End: A5385
• Publication Date: 2019-01-01
• Subjects: Energy Storage -- in situ raman -- lithium battery -- silicon nanowires; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0541903jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Rapid decay of silicon anodes during lithiation poses a significant challenge in application of silicon as an anode material in lithium ion batteries. In situ Raman spectroscopy is a powerful method to study the relationship between structural and electrochemical data during electrode cycling and to allow the observation of amorphous as well as liquid and transient species in a battery cell. Herein, we present in situ Raman spectroscopy on high capacity electrode using uncoated and carbon-coated silicon nanowires during first lithiation and delithiation cycle in an optimized lithium ion battery setup and complement the results with operando X-ray reflection diffraction measurements. During lithiation, we were able to detect a new Raman signal at 1859 cm −1 especially on uncoated silicon nanowires. The detailed in situ Raman measurement of the first lithiation/delithiation cycle allowed to differentiate between morphology changes of the electrode as well as interphase formation from electrolyte components.