Evaluation of Scalable Porous Si‐Rich Si/C Composites with Low Volume Expansion in Coin Cells to Prismatic Cell Formats

Evaluation of Scalable Porous Si‐Rich Si/C Composites with Low Volume Expansion in Coin Cells to Prismatic Cell Formats

Li‐ion battery cells on the basis of Si‐containing anodes suffer from their large volume expansion of up to 300%, impeding their extensive application in the automotive field. Herein, the synthesis of a Si‐rich Si/C composite is introduced. The implemented porosity of the composite has a buffering e...

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Veröffentlicht in:Energy technology (Weinheim, Germany) Germany), 2020-07, Vol.8 (7), p.n/a, Article 2000217
Hauptverfasser: Müller, Verena, Bernhard, Rebecca, Wegener, Jennifer, Pfeiffer, Jürgen, Rössler, Stefan, Scurtu, Rares-George, Memm, Michaela, Danzer, Michael A., Wohlfahrt-Mehrens, Margret
Format: Artikel
Sprache:eng
Schlagworte:
Computed tomography
Cycles
dilatometry
Energy & Fuels
External pressure
Lithium-ion batteries
mechanical deformations
Porosity
prismatic cells
Science & Technology
Si/C composites
Swelling
Technology
volume expansions
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Zusammenfassung:Li‐ion battery cells on the basis of Si‐containing anodes suffer from their large volume expansion of up to 300%, impeding their extensive application in the automotive field. Herein, the synthesis of a Si‐rich Si/C composite is introduced. The implemented porosity of the composite has a buffering effect on the Si volume changes during cycling. The scalability of the material from lab‐scale to industrial‐scale batch sizes as well as from coin cell (
ISSN:2194-4288
2194-4296
DOI:10.1002/ente.202000217