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

Monday (31.08.2020)
12:47 - 12:47 Poster Room
Part of:
- Poster *web*Smoothing of additive manufactured parts using ns-pulsed laser source 1 Dipl.-Ing. Florian Kuisat
- Poster TBA -
- Poster *web*Combustion Synthesis of High Entropy Alloys thin films 1 Dr. Anni Wang
- Poster *web*Surface macro-smoothing and micro-structuring of additive manufactured components by using DLIP technique for controlling wetting characteristics 1 Dipl.-Ing. Florian Kuisat
- Poster *web*Influence of embedding materials on heat transfer and ignition transfer time in heterogeneous reactive material system 1 Mostafa Baloochi
- Poster TBA -
- Poster *web*Self reactive joining process with multilayer foils in lap joint configuration 1 Marcus Glaser
- Poster *web*Thermodynamics and kinetics of phase formation in magnetron-sputtered Ni/Al multilayer thin films with nanoscale morphology 1 Sascha Sebastian Riegler
- Poster *web*Femtosecond laser approach to cut Ni/Al reactive foils without ignition of a self-propagation reaction 1 Maria Amelia Martins
- Poster *web*Reactive Ni/Al multilayers with 3D Morphologies 1 Konrad Jaekel
- Poster *web*Synchrotron radiation X-ray powder diffraction and magnetometric study of natural and synthetic terms of the stannite-kesterite pseudobinary system in the low temperature regime (5-275 K) 1 Dr. Francesco Di Benedetto
- Poster *web*Coating and Drying of Sodium-Ion-Battery Electrodes 1 Julian Klemens
- Poster *web*Analytical prediction model for Direct Laser Interference Patterning 1 Dr. Bogdan Voisiat
- Poster *web*CFD Analysis of joining processes using reactive multilayers on native surface morphologies of microelectronic substrates 1 Erik Wiss
- Poster *web*Top-Hat profile in Direct Laser Interference Patterning: Is it worth it? 1 Mikhael El-Khoury
- Poster *web*Laser-based (“2D”) surface treatment of lithium-ion battery electrodes to improve the rate capability 1 Jens Sandherr
- Poster *web*Microstructure investigation of superconducting NbN thin films on copper 1 Dipl.-Ing. Ying Li
- Poster *web*The kesterite – stannite structural phase transition: alloying Cu2ZnSnS4/Se4 with iron, cadmium and manganese 1 Prof. Dr. Susan Schorr
- Poster *web*Laser functionalized PEEK-based coating systems to minimize friction and wear 1 Dr. Tim Kunze
- Poster *web*Structure and Dynamics in a Layered Na-ion Battery Cathode 1 Euan Bassey
- Poster *web*Electrode-Processing using porous nano-structured Na3V2(PO4)3 (NVP) for Sodium-Ion Batteries 1 Luca Schneider
- Poster *web*Functional Characterization of Materials for Ethanol Exploitation in Electrochemical Energy Conversion and Storage 1 Ph.D. Enrico Berretti
- Poster *web*Experimental Approach for Phase Diagram determination of Li alloys 1 Joel Fels
- Poster *web*Process Integration of Few-Layer MoS2 into a-Si:H Heterojunction pin-Photodiodes for extended Infrared Detection 1 Charles Otieno Ogolla
- Poster *web*Ti3SiC2- and Ti3AlC2-based ceramics synthesis by spark plasma sintering of preceramic paper 1 Elizaveta Sedanova
- Poster *web*Overheating microstructural study of nickel-based superalloys from turbine blades of aircraft engines 1 Dr. Ana Pastor
- Poster *web*Electrochemical thermodynamics of Lithium Batteries and their materials 1 Prof. Dr. Hans Jürgen Seifert
- Poster *web*Corrosion Analysis of a 316L Stainless Steel Gas Outlet Sealed with a Copper Ring Used in the CO2 Methanation Process 1 Ananya Prechavut
- Poster *web*Self-propagating reaction of structured reactive Al/Ni multilayers 1 Yesenia Sauni
- Poster *web*3D structured electrodes for Li-ion batteries using open porous metal foams as current collector for high energy application 1 Jonas Oehm
- Poster *web*Novel air stable single source precursor for homogeneous crystalline TiS2 thin films 1 Anja Sutorius
- Poster *web*Synthesis of nickel-copper composite with controllable nanostructure through facile solvent control as positive electrode for high-performance supercapacitors 1 Dr. Damin Lee
- Poster *web*Towards understanding response generation in conductometric gas sensors 1 Stefan Kucharski
- Poster Effects of 3D electrode design on high-energy silicon-graphite anode materials 1 Yijing Zheng

Session -F: Functional Materials, Surfaces, and Devices
Belongs to:
Topic X: Poster Session

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.

Yijing Zheng
Karlsruhe Institute of Technology (KIT)
Additional Authors:
  • Peter Smyrek
    Karlsruhe Institute of Technology (KIT)
  • Prof. Dr. Hans Jürgen Seifert
    Karlsruhe Institute of Technology (KIT)
  • Prof. Dr. Yuefei Zhang
    Beijing University of Technology
  • Dr. Wilhelm Pfleging
    Karlsruhe Institute of Technology (KIT)