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Effects of 3D electrode design on high-energy silicon-graphite anode materials

Zheng, Yijing; Smyrek, Peter; Seifert, Hans Jürgen; Zhang, Yuefei; Pfleging, Wilhelm

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. ... mehr



Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Poster
Publikationsdatum 23.09.2020
Sprache Englisch
Identifikator KITopen-ID: 1000126098
HGF-Programm 37.01.02 (POF III, LK 01) Components and Cells
Veranstaltung Materials Science and Engineering Congress (MSE 2020), online, 22.09.2020 – 25.09.2020
Projektinformation DFG, DFG EIN, PF 392/9-1
Bemerkung zur Veröffentlichung Symposium F: Functional Materials, Surfaces, and Devices



Die Veranstaltung fand wegen der Corona-Pandemie als Online-Event statt.
Externe Relationen Abstract/Volltext
Schlagwörter 3D battery, Si/graphite anode, laser-induced plasma spectroscopy
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