Lithium Ion Pathway within Li 7 La 3 Zr 2 O 12 ‐Polyethylene Oxide Composite Electrolytes

Polymer-ceramic composite electrolytes are emerging as a promising solution to deliver high ionic conductivity, optimal mechanical properties, and good safety for developing high-performance all-solid-state rechargeable batteries. Composite electrolytes have been prepared with cubic-phase Li7 La3 Zr2 O12 (LLZO) garnet and polyethylene oxide (PEO) and employed in symmetric lithium battery cells. By combining selective isotope labeling and high-resolution solid-state Li NMR, we are able to track Li ion pathways within LLZO-PEO composite electrolytes by monitoring the replacement of (7) Li in the composite electrolyte by (6) Li from the (6) Li metal electrodes during battery cycling. We have provided the first…

• NS
  National Science Foundation

  Award: DMR-1157490
• FS
  Florida State University
• NH
  National High Magnetic Field Laboratory
• DO
  Division of Materials Research