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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
Manufacturing and Characterization of Advanced High Energy Silicon/Graphite Electrodes
Abstract
Next generation lithium-ion batteries (LIB) with high energy density and high power density have recently become of great interest for electric vehicle and portable devices. With the further upgrade of especially electric vehicles, the next generation LIB with high power and high energy density is urgently required. For this purpose, composite electrode consisting of commercially available graphite active material mixed with silicon nanoparticles is under current development. The main objectives are a significant increase of the practical capacity and energy density of commercial anodes, an overcome of the drawbacks of pure silicon due to large volume changes during electrochemical cycling, and the development of a technology suitable for mass production. In order to reduce the intrinsic mechanical stress of silicon/graphite electrodes and to improve the lithium-ion transport kinetic, free-standing electrode structures were generated by applying ultrafast industrial capable laser material processing. This advanced laser technology is demonstrated to be a flexible and powerful tool for pushing silicon/graphite (Si/C) composite anode materials beyond state of the art electrodes towards application. The electrochemical properties of cells with unstructured and structured electrodes were systematically analyzed by means of cyclic voltammetry, galvanostatic measurements, and electrochemical impedance spectroscopy. The increased active surface enables a significant improvement of lithium-ion diffusion kinetics. Furthermore, it is expected that the increased active surface will also provide additional artificial porosity for active material expansion, which in turn will reduce the mechanical stress within the electrodes during lithiation or delithiation. In this context, in-situ scanning electron microscopy (SEM) was performed in order to analyze the active material volume changes during charging and discharging. A main engineering challenge was to optimize the electrode architecture such as the pitch distance of free-standing structures regarding an enhanced electrochemical performance and a reduced material loss. Furthermore, an alumina (Al2O3) layer with a thickness of 5 nm, which acts as an artificial SEI, was coated on structured silicon/graphite electrodes by applying Atomic Layer Deposition (ALD). Cyclic voltammetry measurements were subsequently performed in order to investigate the fundamental properties of cells with structured and Al2O3- coated silicon/graphite electrodes. Galvanostatic measurements reveal that the cells with structured electrodes exhibit excellent electrochemical properties, i.e., a significantly improved capacity retention. ALD layers can contribute to further improvement of cycle stability and cell lifetime. In addition, advanced full cells with Lithium Nickel Manganese Cobalt Oxide NMC622 as cathode and Si/C as counter electrode were assembled and the electrochemical data will be presented.