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Lithium distribution in structured graphite anodes investigated by laser-induced breakdown spectroscopy

Zheng, Y. ORCID iD icon 1; Pfäffl, L. 1; Seifert, H. J. 1; Pfleging, W. ORCID iD icon 1
1 Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

For the development of thick film graphite electrodes, a 3D battery concept is applied, which significantly improves lithium-ion diffusion kinetics, high-rate capability, and cell lifetime and reduces mechanical tensions. Our current research indicates that 3D architectures of anode materials can prevent cells from capacity fading at high C-rates and improve cell lifespan. For the further research and development of 3D battery concepts, it is important to scientifically understand 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 quantitatively studying the lithium concentration profiles within the entire structured and unstructured 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. This result indicates that 3D architectures established on anode electrodes can accelerate the lithium-ion extraction process and reduce the formation of inactive materials during electrochemical cycling. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000099768
Veröffentlicht am 13.11.2019
DOI: 10.3390/app9204218
Zitationen: 22
Zitationen: 21
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2076-3417
KITopen-ID: 1000099768
HGF-Programm 37.01.02 (POF III, LK 01) Components and Cells
Erschienen in Applied Sciences
Verlag MDPI
Band 9
Heft 20
Seiten Article No.4218
Projektinformation DFG, DFG EIN, PF 392/9-1
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 10.10.2019
Schlagwörter graphite anode; laser-induced breakdown spectroscopy; 3D battery; ultrafast laser ablation; lithium-ion battery; KNMF 2018-019-021333 LMP;
Nachgewiesen in Scopus
Web of Science
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