CRR Produces Solid-State Battery Composite Layer in Single Pass

Critical Resources (ASX: CRR) says it has produced a full solid-state battery composite layer in a single dry, room-temperature deposition step. The process, which the company calls DSD and compares to 3D printing, forms a dense, uniform coating without solvents, drying cycles, or furnace processing. The layer is 15 microns thick and combines LFP cathode material with a LLZO reference solid electrolyte and a carbon-nanotube conductive network on aluminium foil.

The achievement sits inside a structured technical evaluation program, not as a standalone lab result. CRR holds a 12-month exclusive option over a solid-state battery patent portfolio from the South Dakota School of Mines & Technology, covering five granted US patents and one pending patent. That option entered a formal six-month evaluation program under an NSF-supported framework in early 2026. The company's strategy is to develop and license battery and manufacturing-process IP, not to build cells itself.

Earlier work on the electrolyte layer had already produced benchmarks: more than 1,200 hours of interface stability, 3.2 mS/cm ionic conductivity, and 0.27 eV activation energy. The current filing references that conductivity number as supporting context for the composite layer, the company said. It does not frame the number as a finished cell result.

Testing has now started in CR2032 coin-cell format using a liquid electrolyte as a reference. Early charge-discharge behaviour is reportedly consistent with expected material performance, according to the company. Quantitative data on capacity retention, cycling efficiency, and reproducibility has not yet been disclosed. A full-format pouch cell prototype is in development, with independent testing planned. The filing itself notes that scaling from coin cells to pouch cells may introduce reproducibility and interface-quality risk.