Aging‐Driven Composition and Distribution Changes of Electrolyte and Graphite Anode in 18650‐Type Li‐Ion Batteries
Source abstract
Abstract
Abstract A series of low‐temperature studies on LiNi0.80Co0.15Al0.05O2 18650‐type batteries of high‐energy type with different stabilized states of fatigue is carried out using spatially resolved neutron powder diffraction, infrared/thermal imaging, and quasi‐adiabatic calorimetry. In‐plane distribution of lithium in the graphite anode and frozen electrolyte in fully charged state is determined non‐destructively with neutron diffraction and correlated to the introduced state of fatigue. An independent electrolyte characterization is performed via calorimetry studies on variously aged 18650‐type lithium‐ion batteries, where the shape of the thermodynamic signal is evolving with the state of fatigue of the cells. Analyzing the liquid electrolyte extracted/harvested from the studied cells reveals the decomposition of conducting salt to be the main driving factor for fatigue in the electrolyte degradation.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Forschungs‐Neutronenquelle Heinz Maier‐Leibnitz FRM II Technische Universität München Lichtenbergstr. 1 85748 Garching bei München Germany
Lehrstuhl für Funktionelle Materialien, Physik‐Department Technische Universität München James‐Franck‐Straße 1 85748 Garching bei München Germany
Deutsches Elektronen Synchrotron (DESY) Notkestr. 85 22607 Hamburg Germany
Münster Electrochemical Energy Technology (MEET) Westfälische Wilhelms‐Universität Münster Correnstr. 46 48149 Münster Germany
Energy Storage and Distributed Resources Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
Institute of Inorganic Chemistry University of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
Department of Physics and Atmospheric Science Dalhousie University Halifax NS B3H 3J5 Canada
Funding
Bundesministerium für Bildung und Forschung
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