A cost-effective, ionically conductive and compressible oxychloride solid-state electrolyte for stable all-solid-state lithium-based batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37369677.
- Also identified by DOI 10.1038/s41467-023-39522-1 and PMC identifier 10300059.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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<sup>-1</sup> 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<sub>1.75</sub>ZrCl<sub>4.75</sub>O<sub>0.5</sub> oxychloride solid-state electrolyte that demonstrates an ionic conductivity of 2.42 mS cm<sup>-1</sup> 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<sub>1.75</sub>ZrCl<sub>4.75</sub>O<sub>0.5</sub> is tested in combination with a LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub>-based positive electrode and a Li<sub>6</sub>PS<sub>5</sub>Cl-coated Li-In negative electrode in lab-scale cell configuration. This all-solid-state cell delivers a discharge capacity retention of 70.34% (final discharge capacity of 70.2 mAh g<sup>-1</sup>) after 2082 cycles at 1 A g<sup>-1</sup>, 25 °C and 1.5 tons of stacking pressure.