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Laser-induced breakdown spectroscopy for studying the electrochemical impact of porosity variations in composite electrode materials

Smyrek, Peter; Zheng, Y.; Rakebrandt, J. H.; Seifert, Hans Jürgen; Pfleging, Wilhelm

The porosity in composite electrode materials can vary on micro-and nanometer scale and has a great impact on electrochemical performance in lithium-ion cells. Liquid electrolyte has to penetrate into the entire porous electrodes in order to enable lithium-ion diffusion. For studying the electrochemical impact of porosity variations in composite lithium-nickel-manganese-cobalt-oxide thick films (Li(Ni 1/3 Mn 1/3 Co 1/3 )O 2 , NMC), laser-induced breakdown spectroscopy (LIBS) was applied. A rapid chemical screening of the complete electrode after electrochemical cycling and cell degradation was performed. This rather new technological approach was used to obtain post-mortem critical information about surface and bulk phenomena that define and control the performance of lithium-ion batteries. The influence of porosity variations along NMC electrode surfaces was studied regarding capacity retention, life-time, and lithium distribution. For this purpose, different geometrical arrangements of porosity distribution were generated by embossing. Using LIBS, elemental mapping of lithium was obtained with a lateral resolution of 100 μm. A cor ... mehr

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Postprint §
DOI: 10.5445/IR/1000083618
Veröffentlicht am 09.02.2019
DOI: 10.1109/3M-NANO.2017.8286301
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Proceedingsbeitrag
Jahr 2018
Sprache Englisch
Identifikator ISBN: 978-1-5386-1081-7
KITopen-ID: 1000083618
HGF-Programm 37.01.02 (POF III, LK 01)
Erschienen in The 7th International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale : IEEE 3M-NANO 2017 : Shanghai, China, 7-11 August 2017 / 3M-NANO 2017
Verlag IEEE, Piscataway (NJ)
Seiten 65-68
Projektinformation FabSurfWAR (EU, H2020, 644971)
Schlagworte Proposal-ID: 2016-016-013609 (KNMF-LMP)
Nachgewiesen in Scopus
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