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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pfleging, Wilhelm
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2024Next-Generation Batteries through Advanced 3D Electrode and Material Concepts
- 2024Laser Ablation of Electrodes for Next Generation Batteries
- 2023Ultrafast Laser Patterning of Silicon/Graphite Composite Electrodes to Boost Battery Performance
- 2023Electrochemical Performance of Lithium-Ion Pouch Cells Containing Aqueous Processed and Laser Structured Thick Film NMC 622 and Graphite Electrodes
- 2023Laser structuring of high mass loaded and aqueous acid processed Li(Ni₀.₆Mn₀.₂Co₀.₂)O₂ cathodes for lithium-ion batteries
- 2023Laser materials processing in manufacturing of lithium-ion batteries
- 2022How lasers can push silicon-graphite anodes towards next-generation battery
- 2022Ultrafast laser ablation of aqueous processed thick-film Li(Ni$_{0.6}$Mn$_{0.2}$Co$_{0.2}$)$_{O2}$ cathodes with 3D architectures for lithium-ion batteries
- 20223D Printing of Silicon-Based Anodes for Lithium-Ion Batteries
- 2022Investigation of Manufacturing Strategies for Advanced Silicon/Graphite Composite Anodes for Lithium-Ion Cells
- 2022Multiobjective Optimization of Laser Polishing of Additively Manufactured Ti-6Al-4V Parts for Minimum Surface Roughness and Heat-Affected Zonecitations
- 2021Electro-Chemical Modelling of Laser Structured Electrodes
- 2021Laser Additive Manufacturing for the Realization of New Material Concepts
- 2021The Effect of Silicon Grade and Electrode Architecture on the Performance of Advanced Anodes for Next Generation Lithium-Ion Cellscitations
- 2020Effect of laser structured micro patterns on the polyvinyl butyral/oxide/steel interface stabilitycitations
- 2020Laser polishing of additively manufactured Ti-6Al-4V: Microstructure evolution and material propertiescitations
- 2020Effects of 3D electrode design on high-energy silicon-graphite anode materials
- 2020Ultrafast Laser Materials Processing of Electrodes for Next Generation Li-Ion Batteries (NextGen-3DBat)
- 2020Two-Step Laser Post-Processing for the Surface Functionalization of Additively Manufactured Ti-6Al-4V Partscitations
- 2020Lithium-Ion Battery—3D Micro-/Nano-Structuring, Modification and Characterizationcitations
- 2019Manufacturing and Characterization of Advanced High Energy Silicon/Graphite Electrodes
- 2019Experimental analysis of laser post-processing of additive manufactured metallic parts
- 2017Laser-Materials Processing for Energy Storage Applications
- 2014Laser ablation mechanism for modification of composite electrodes with improved electrolyte wetting behaviour
- 2007High speed fabrication of functional PMMA microfluidic devices by CO2-laser patterning and HPD-laser transmission welding
Places of action
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document
Effects of 3D electrode design on high-energy silicon-graphite anode materials
Abstract
Graphite-based anode materials have dominated the lithium-ion batteries (LIBs) for almost three decades due to its outstanding electrochemical cycle stability, moderate specific capacity, and low production costs. However, it could not meet the application requirements of LIBs regarding fast charging, and high energy and power density operations, especially for electrical vehicles. Silicon due to its high theoretic capacity (4200mAh/g) has been regarded as a promising anode material for next-generation LIBs. At KIT, the silicon-graphite (Si-C) composite anode material is being developed assisted by ultrafast laser processing. Commercial composite graphite anodes are doped with nano-sized silicon particles (10-20 wt.%). This approach is expected to meet the demand of high energy density by adding silicon as active material and to maintain the cycle stability and battery lifetime using graphite as basic material. In addition, ultrafast laser processing is applied for generation of three-dimensional (3D) cell architectures on silicon-graphite electrodes. 3D electrode architectures can enhance the interfacial area between the active material and the free liquid electrolyte. Thereby the lithium-ion transport kinetic can be significantly improved. Furthermore, the laser-generated free-standing channels within the electrode provide sufficient free spaces for volume charging during alloying and de-alloying with silicon while reducing mechanical stress. Coin cells with structured and unstructured electrodes were assembled for subsequent electrochemical analytics. The impact of 3D electrode architectures on battery performances was systematically investigated and demonstrated by means of cyclic voltammetry, galvanostatic measurements, and electrochemical impedance spectroscopy. Cells with structured electrodes revealed a significant improvement in rate capability, cycle stability, and lifetimes. Furthermore, in-situ scanning electron microscopy enabled to observe a real-time morphological and structural evolution of 3D Si-C electrodes compared with the unstructured electrodes. Finally, laser-induced breakdown spectroscopy (LIBS) was applied for evaluation of lithium diffusion length and quantitative lithium distribution along the electrode as function of cycling conditions. On base of these data, the degradation mechanisms in Si-C electrodes will be discussed.