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New study addresses the safety of lithium-ion batteries under mechanical crush loading and shows potential of discrete layered finite element models to improve analysis

This paper focuses on the safety of lithium-ion batteries during mechanical crush loading, as excessive loads can lead to internal short circuits and thermal runaway. The study uses discrete layered finite element models to analyze the internal stress and deformation of the battery cell, addressing challenges in material parameter measurements, meshing, and validation…

Investigation of the heat evolution of lithium- and manganese-rich layered oxides (LMR-NCMs) by isothermal microcalorimetry

In this study, isothermal micro-calorimetry is used to examine the heat generation of lithium- and manganese-rich layered oxides (LMR-NCMs) during their first cycle. LMR-NCM exhibits a voltage hysteresis and a unique voltage plateau at ≈4.5 V during the first charge, leading to irreversible structural rearrangements and significant heat generation. The results…

Seven recently published papers from different areas of battery research at TUM

Integration of laser structuring into the electrode manufacturing process chain for lithium-ion batteries / Hille, Lucas; Noecker, Marc P.; Ko, Byeongwang; Kriegler, Johannes; Keilhofer, Josef; Stock, Sandro; Zaeh, Michael F. /Journal of Power Sources 556, 2023, 232478 - DOI Fast charging capability of thin-film Prussian Blue Analog electrodes for aqueous sodium-ion…

New publication by the Chair of Technical Electrochemistry (TEC) comparing silicon and graphite anodes

In order to meaningfully compare active battery materials with different properties, it is important to consider both the intrinsic electrochemical properties and the differences in the porous electrode structures at the same practically relevant area capacities. In this study, graphite and microsilicon anodes with a practical area capacity of 2.8 mAh cm-2 for…

New study shows stability limits of nickel-containing transition metal oxides with higher nickel content as cathode active materials

The study investigates the stability limits of layered transition metal oxides (LiMO2) with higher nickel content as cathode active materials (CAMs). The improved performance is attributed to the lower potential of nickel-rich CAMs, which prevents detrimental electrolyte oxidation. The research finds that the stability of CAMs is determined by their composition and…

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