P1-059
Li/Mn-rich layered oxide cathode active materials (LMR) have gained attention due to their exceptionally high practical specific discharge capacity (>250 mAh g-1) originating from both cationic and anionic redox. The latter is only achievable after electrochemical activation of oxygen redox at high potential (> 4.6 V vs. Li+|Li), though this is accompanied by the destabilization […]
P2-062
Scientific investigations into the safety of lithium-ion batteries often rely on small sample sizes, potentially leading to misinterpretations of test results. It is crucial to determine the optimal number of cells to test for obtaining meaningful and reliable results. This study focuses on 18650-type cylindrical cells with a capacity of 2.8 Ah and a NMC811/Gr […]
P2-091
In recent years, there has been a significant emphasis on enhancing lithium-ion batteries, transforming electric vehicles, stationary storage technologies, and portable electronics. Their lifespan, particularly in relation to capacity fade, is predominantly influenced by electrode degradation and the deactivation of active materials. Another critical aspect impacting battery lifespan and performance is the solid electrolyte interphase […]
P1-086
Calcium metal negatrodes are interesting candidates to post lithium ion batteries, as calcium is highly abundant and has a low oxidation potential. Due to the easily passivating nature of Ca the highest priority is to generate Ca2+-conducting artificial interphases. Ca dissolves in liquid ammonia. Upon evaporation of the solvent the metallic complex [Ca(NH3)6] forms and […]
P3-043
Electrochemical impedance spectroscopy (EIS) is a widely recognized method used to evaluate the electrochemical characteristics of batteries. This technique demonstrates a strong relationship between impedance and battery states, such as temperature, state of health (SOH), and state of charge (SOC). EIS promises much more than simply cell-level analysis. Because of its non-destructive characteristics, its use […]
P1-048_Glatt
The vastly increasing material demand for the production of EV batteries and energy storage systems as well as the new EU regulatory framework for battery material recycling quotas has led to an increasing interest in the use of recycled materials in the battery production. The development of sustainable material concepts for battery production has therefore […]
P5-069
Recycling of lithium-ion batteries (LIBs) helps conserve natural resources and minimizes the need for extracting and refining raw materials. There are various methods industrially available for the recycling of LIBs, including pyrometallurgy and hydrometallurgy or combinations of both. Pyrometallurgy is a well-established method, but the achievable recycling rate is limited as the process is focused […]
P4-024
Ziel In einer Zusammenarbeit zwischen der TUM, der RWTH Aachen und den Fraunhofer Instituten ISIT und IISB wurde eine ganzheitliche Toolchain entlang der Batterie- und Speicherwertschöpfungskette entwickelt. Die Toolchain ermöglicht eine vollständige Analyse von Batteriespeichern, beginnend beim Batteriezelldesign bis hin zur Systemperformance in Batterieanwendungen. Methodik Zu Beginn der Toolchain steht die ISEA Cell & Pack […]
P1-079
This poster investigates all-solid-state batteries through optical and chemical post-mortem analysis of monolayer and multilayer cells. The goal is to identify the primary aging mechanism(s) and address design challenges. Both pristine and cyclic-aged cells were opened in an argon atmosphere after obtaining ultrasound images. Structural changes within different layers and material interfaces were observed. The […]
P3-018
Lithium-ion batteries suffer from a free-fall drop in available capacity and accelerated ageing under extremely cold climates. Therefore, they must be preheated before normal operations. Internal heating schemes using direct current (DC) or alternating current (AC) are more promising than traditional conductive and convective approaches owing to their superiorities in terms of high efficiency, rapid […]