19 February 2018 Laser in battery manufacturing: impact of intrinsic and artificial electrode porosity on chemical degradation and battery lifetime
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Abstract
The main goal is to develop an optimized three-dimensional (3D) cell design with improved electrochemical properties, which can be correlated to a characteristic lithium distribution along 3D micro-structures at different State-of-Health (SoH). 3D elemental mapping was applied for characterizing the whole electrode as function of SoH. It was demonstrated that fs-laser generated 3D architectures improves the battery performance regarding battery power and lifetime. It was quantitatively shown by laser-induced breakdown spectroscopy that 3D architectures act as attractor for lithium-ions. Furthermore, lateral intrinsic porosity variations were identified to be possible starting points for lithium plating and subsequent cell degradation. Results achieved from post-mortem studies of cells with laser structured electrodes (intrinsic and artificial porosity variation), and unstructured lithium-nickel-manganese-cobalt-oxide electrodes will be presented.
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P. Smyrek, Y. Zheng, H. J. Seifert, W. Pfleging, "Laser in battery manufacturing: impact of intrinsic and artificial electrode porosity on chemical degradation and battery lifetime", Proc. SPIE 10520, Laser-based Micro- and Nanoprocessing XII, 1052017 (19 February 2018); doi: 10.1117/12.2288440; https://doi.org/10.1117/12.2288440
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