Critical Resources Ltd (ASX:CRR, FRA:9S70) earlier this week reported a significant technical milestone in its solid-state battery strategy, with laboratory validation confirming the performance of its amorphous solid-state electrolyte (ASE) under extended testing conditions.
Managing Director Tim Wither said the company had demonstrated sustained stability of more than 1200 hours at room temperature, a result that addresses one of the most persistent challenges in solid-state battery development. He noted that validation under ambient conditions is critical, stating that without room temperature performance, “nothing else really matters.”
Wither explained that the ASE chemistry had matched the conductivity of leading sulfide-based systems while maintaining stability over prolonged periods. He added that the company had progressed beyond early-stage material testing by successfully integrating the electrolyte into a functioning battery cell, an achievement that distinguishes the program from many research initiatives that fail to reach this stage.
The ASE program forms part of a broader technology strategy that includes the Dry Supersonic Deposition (DSD) workstream, which focuses on solvent-free cathode manufacturing. Wither indicated that the company is addressing both core aspects of battery development—materials performance and scalable production—highlighting that strong chemistry alone is insufficient without a viable manufacturing pathway.
Key Highlights
- Critical Resources Ltd achieved a key milestone in its solid-state battery strategy
- ASE demonstrated 1200+ hours of stability at room temperature
- Electrolyte matched conductivity of leading sulfide systems
- Validation conducted within a working battery cell, not just lab material
- Room temperature performance seen as critical for real-world viability
- ASE program complements DSD (Dry Supersonic Deposition) manufacturing workstream
- Collaboration with South Dakota School of Mines provides advanced research access
- Focus on both battery chemistry and scalable manufacturing
- Solid-state batteries positioned as next-generation, safer, high-density solutions
- Strategic importance highlighted by global battery supply chain dominance
- prototype development and independent testing in the near term
Proactive: Critical Resources Ltd this week reported a key technical milestone in its solid-state battery strategy, demonstrating sustained stability and performance under testing. With me to discuss this latest milestone is Managing Director Tim Wither. Tim, good to see you.
Tim Wither: Thanks, Jonathan. Yeah, it's pretty exciting news.
Proactive: Talk us through this validation, particularly how the ASE shows stable operation for more than 1200 hours at room temperature. What does this mean in real-world terms?
Tim Wither: Batteries we use today can overheat, catch fire, and are reaching performance limits. Solid-state batteries are the evolution, removing the liquid electrolyte. Our ASE program is tackling one of the hardest problems. What’s exciting is this next-generation electrolyte chemistry has matched the conductivity of sulfide systems and held stable over 1200 hours, or 50 days. That directly addresses a key technical challenge.
Proactive: So this means longer life and better energy management?
Tim Wither: Yes, and importantly it works at room temperature. Many solid-state systems only perform when heated, which makes them impractical. “Without that being validated at room temperature, nothing else really matters.”
Proactive: How far are we from a commercially viable product?
Tim Wither: We didn’t just test the material—we built it into a working battery cell. That’s significant. There’s still refinement needed, but we’re solving both the chemistry and manufacturing challenges. Good chemistry means nothing if you can’t scale it cost-effectively.
Proactive: You’re working with the South Dakota School of Mines. What do they bring?
Tim Wither: We’ve optioned the IP through them and are working within a US research system with access to infrastructure we couldn’t otherwise access. We’re actively building cells and progressing the program.
Proactive: How important are solid-state batteries to the future energy mix?
Tim Wither: They provide higher energy density and safer batteries. They won’t replace existing tech but will complement it. There’s also a strategic angle—China controls over 90% of battery manufacturing, so building capability is critical.
Proactive: What’s next?
Tim Wither: This gives us exposure to the end game alongside our Mavis Lake lithium project. We’re aiming for a prototype and independent testing mid-year. It’s an aggressive timeline, but we’re advancing quickly.