Battery technology

Solid electrolyte systems from ion-conducting glasses and glass ceramics

Solid electrolyte based on glass ceramic. Mechanically ground to a thickness of approx. 160 µm.
© Fraunhofer ISC

Solid electrolyte based on glass ceramic. Mechanically ground to a thickness of approx. 160 µm.

SEM image on fracture surface of cast electrolyte foil.
© Fraunhofer ISC

SEM image on fracture surface of cast electrolyte foil.

Co-sintering of electrolyte and electrode.
© Fraunhofer ISC

Co-sintering of electrolyte and electrode.

Method of manufacturing glasses

  • Starting material in powder form
  • Weighing and mixing
  • Temperature treatment in the melting furnace
  • Shaping with quenching
  • Oxidic ion-conducting glasses (e.g. phosphate glasses and borate glasses)
  • Conductivity > 10-6 S/cm
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Method of manufacturing glass-ceramics

  • Glass (e.g. NaSiCon-like composition)
  • Temperature treatment (nucleation and crystallization)
  • Glass ceramic with adjustable microstructure
  • Conductivity > 10-4 S/cm

 

Further processing in powder form

  • For purely inorganic electrolytes (e.g. in thin layers)
  • For the production of electrode components (composites of active material, ionic conductors, electron conductors)
  • For hybrid electrolytes (e.g. with ORMOCER® binder)