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Investigation of the influence of 3D electrode architectures on lithium distribution in anode materials by laser-induced breakdown spectroscopy

Zheng, Yijing; Pfäffl, Lisa; Smyrek, Peter; Seifert, Hans Jürgen; Pfleging, Wilhelm ORCID iD icon

Abstract (englisch):

For the development of thick film graphite and silicon/graphite electrodes a 3D battery concept is applied, which significantly improves lithium-ion diffusion kinetics, high rate capability, cell lifetime, and reduces mechanical stress. Our current research indicates that 3D architectures of anode materials can prevent cells from capacity fading at high C-rates, suppress the electrode degradation and reduce the overall cell impedance. Especially, the ultrafast laser-generated free spaces in silicon/graphite electrodes act as a buffer zone, which can remarkably reduce the internal mechanical stress during lithium-ion insertion and extraction. For further research and development of 3D battery concepts, it is important to understand scientifically the influence of laser-generated 3D anode architectures on lithium distribution during charging and discharging at elevated C-rates. Laser-induced breakdown spectroscopy (LIBS) is applied post-mortem for studying quantitatively the lithium concentration profiles within entire structured and unstructured graphite and silicon/graphite electrodes. Space-resolved LIBS measurements revealed that less lithium-ion content could be detected in structured electrodes at delithiated state in comparison to unstructured electrodes. ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Vortrag
Publikationsdatum 06.02.2020
Sprache Englisch
Identifikator KITopen-ID: 1000125899
HGF-Programm 37.01.02 (POF III, LK 01) Components and Cells
Weitere HGF-Programme 49.01.09 (POF III, LK 02) Laser Material Processing
Veranstaltung 14th Laser-based Micro- and Nanoprocessing (2020), San Francisco, CA, USA, 03.02.2020 – 06.02.2020
Projektinformation DFG, DFG EIN, PF 392/9-1
Externe Relationen Siehe auch
Schlagwörter silicon/graphite anode, ultrafast laser, laser-induced breakdown spectroscopy, 3D battery, energy storage
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