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Ultrafast Laser Materials Processing of Electrodes for Next Generation Li-Ion Batteries (NextGen-3DBat)

Meyer, Alexandra; Zhu, Penghui; Seifert, Hans Jürgen; Pfleging, Wilhelm

To contribute to a turnaround in energy policy, lithium(Li)-ion cells with significantly increased power and energy density are required. Therefore, high energy materials such as nickel-enriched lithium nickel manganese cobalt oxide (NMC 622) and silicon/graphite (Si/G) composite electrodes with a high areal capacity (>>4 mAh/cm2) and respective film thickness (>> 100 µm), and a 3D electrode structure for high rate capability will be developed. Batteries with NMC 622 show in comparison to those with NMC 111 a higher capacity, and a better capacity retention and cell lifetime in comparison to cells with NMC 811. The manufactured slurries are either NMP- or water-based. The usage of water-based instead of NMP-based systems will lead to a better environmental sustainability while making the recovery of the organic solvent redundant. To further increase the energy density on cell level, Si/G composite anodes are being used, as Si provides one order of magnitude higher theoretical capacity than graphite. To make this advantage practicable, the utilisation of Si-nanoparticles as well as the introduction of free-standing structures in the anode via laser structuring to compensate the volume changes of Si during alloying with Li are necessary. ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Poster
Publikationsdatum 28.07.2020
Sprache Englisch
Identifikator KITopen-ID: 1000126095
HGF-Programm 37.01.02 (POF III, LK 01)
Components and Cells
Veranstaltung International Battery Seminar & Exhibit (2020), online, 28.07.2020 – 30.07.2020
Projektinformation Next-Gen-3DBat (BMBF, 03XP0198F)
Bemerkung zur Veröffentlichung Die Veranstaltung fand wegen der Corona-Pandemie als Online-Event statt.
Externe Relationen Konferenz
Schlagwörter 3D battery, next generation battery, ultrafast laser radiation, laser ablation
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