Lithium Plating on Graphite Negative Electrodes: Innovative Qualitative and Quantitative Investigation Methods. Issue 14 (2nd October 2015)

• Record Type: Journal Article
• Authors: Birkenmaier, Claudia; Bitzer, Bernhard; Harzheim, Matthias; Hintennach, Andreas; Schleid, Thomas
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 14(2015)
• Page Start: A2646
• Page End: A2650
• Publication Date: 2015-10-02
• Subjects: graphite anodes -- laser triangulation -- lithium plating -- surface investigations; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0451514jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The effect of metallic lithium depositing on the negative electrode surface of a carbon-based lithium-ion battery instead of intercalating into the graphitic layers, namely lithium plating, can be assigned to charging at low temperatures and/or high currents. Cell parameters, such as performance and safety, are negatively influenced by this phenomenon. Elemental lithium deposited on the negative electrode requires more space than the intercalated compound and therefore increases the cell volume. Thus, the thickness changes during cycling can be used as a qualitative indicator for lithium plating. In this context, two different non-destructive experimental setups detecting the thickness profiles in situ are presented. Moreover, a quantitative titration technique to determine the exact amount of lithium deposited is established.