TY - JOUR A1 - Frankenberger, Martin A1 - Trunk, Markus A1 - Seidlmayer, Stefan A1 - Dinter, Alexander A1 - Dittloff, Johannes A1 - Werner, Lukas A1 - Gernhäuser, Roman A1 - Revay, Zsolt A1 - Märkisch, Bastian A1 - Gilles, Ralph A1 - Pettinger, Karl-Heinz T1 - SEI Growth Impacts of Lamination, Formation and Cycling in Lithium Ion Batteries JF - Batteries N2 - The accumulation of solid electrolyte interphases (SEI) in graphite anodes related to elevated formation rates (0.1C, 1C and 2C), cycling rates (1C and 2C), and electrode-separator lamination is investigated. As shown previously, the lamination technique is beneficial for the capacity aging in graphite-LiNi1/3Mn1/3Co1/3O2 cells. Here, surface resistance growth phenomena are quantified using electrochemical impedance spectroscopy (EIS). The graphite anodes were extracted from the graphite NMC cells in their fully discharged state and irreversible accumulations of lithium in the SEI are revealed using neutron depth profiling (NDP). In this post-mortem study, NDP reveals uniform lithium accumulations as a function of depth with lithium situated at the surface of the graphite particles thus forming the SEI. The SEI was found to grow logarithmically with cycle number starting with the main formation in the initial cycles. Furthermore, the EIS measurements indicate that benefits from lamination arise from surface resistance growth phenomena aside from SEI growth in superior anode fractions. Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:860-opus4-2770 VL - 6 IS - 21 ER -