SEI Growth Impacts of Lamination, Formation and Cycling in Lithium Ion Batteries
| Autor: | Martin Frankenberger, Stefan Seidlmayer, Johannes Dittloff, Zsolt Révay, Markus Trunk, Karl-Heinz Pettinger, Alexander Dinter, Ralph Gilles, Lukas Werner, Roman Gernhäuser, Bastian Märkisch |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
solid-electrolyte-interphase Energy Engineering and Power Technology chemistry.chemical_element Neutron depth profiling Electrolyte lithium-ion battery Lithium-ion battery law.invention law Lamination lcsh:TK1001-1841 Electrochemistry lamination electrochemical impedance spectroscopy neutron depth profiling formation lifetime Graphite Electrical and Electronic Engineering Anode Dielectric spectroscopy lcsh:Production of electric energy or power. Powerplants. Central stations Chemical engineering chemistry lcsh:Industrial electrochemistry Lithium lcsh:TP250-261 |
| Zdroj: | Batteries; Volume 6; Issue 2; Pages: 21 Batteries, Vol 6, Iss 2, p 21 (2020) |
| ISSN: | 2313-0105 |
| DOI: | 10.3390/batteries6020021 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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