A cost-effective, ionically conductive and compressible oxychloride solid-state electrolyte for stable all-solid-state lithium-based batteries

Abstract To enable the development of all-solid-state batteries, an inorganic solid-state electrolyte should demonstrate high ionic conductivity (i.e., > 1 mS cm −1 at 25 °C), compressibility (e.g., > 90% density under 250−350 MPa), and cost-effectiveness (e.g., < $50/kg). Here we report the development and preparation of Li 1.75 ZrCl 4.75 O 0.5 oxychloride solid-state electrolyte that demonstrates an ionic conductivity of 2.42 mS cm −1 at 25 °C, a compressibility enabling 94.2% density under 300 MPa and an estimated raw materials cost of $11.60/kg. As proof of concept, the Li 1.75 ZrCl 4.75 O 0.5 is tested in combination with a LiNi 0.8 Mn 0.1 Co 0.1 O 2 -based positive electrode and a Li 6 PS 5…

• NN
  National Natural Science Foundation of China

  Awards: 21825302, 51802302
• CA
  Chinese Academy of Sciences

  Award: XDB0450201
• UO
  University of Science and Technology of China

  Award: YD2060002033
• NS
  National Synchrotron Radiation Laboratory

  Award: KY2060000199
• FR
  Fundamental Research Funds for the Central Universities

  Award: WK3430000006