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Open Access Publications from the University of California

All-Solid-State Batteries Using Rationally Designed Garnet Electrolyte Frameworks

  • Author(s): Yi, E
  • Shen, H
  • Heywood, S
  • Alvarado, J
  • Parkinson, DY
  • Chen, G
  • Sofie, SW
  • Doeff, MM
  • et al.

Functioning bulk-type all-solid-state batteries in a practical form factor with composite positive electrodes, using Al-substituted Li La Zr O (LLZO) as the solid electrolyte, have been demonstrated for the first time. The devices incorporate bilayers composed of dense LLZO membranes and porous LLZO scaffolds infiltrated with LiNi Mn Co O and other components as positive electrodes, combined with lithium anodes. The porous scaffolds are prepared using an easily scaled freeze-tape-casting method. The unidirectional pores of the scaffold facilitate infiltration of cathode components and shorten lithium ion diffusion path lengths, while the addition of a soft ionically conductive solid to the scaffold ensures good contact among the components. 7 3 2 12 0.6 0.2 0.2 2

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