Iron-based catalysts advance experimental lithium–CO₂ batteries
Laboratory gains suggest a route away from precious metals, but durability remains unresolved
Iron-and-molybdenum catalysts could help reduce reliance on scarce precious metals in experimental lithium–CO₂ batteries, according to a University of Surrey study published in the Journal of Power Sources. Performance was comparable to, and on some measures better than, previously reported precious-metal catalysts.
The best catalyst recovered 93% of electrical charge during recharging. Its 92 laboratory cycles deliberately limited the charge released each time, so do not establish commercial lifespan. Lithium–CO₂ technology remains at an early stage, with commercial lithium-ion batteries currently outperforming it on reliability and lifespan.
Why this matters for policymakers
- Research funding Our analysis: prioritise longer-duration testing before supporting deployment.
- Supply resilience Our analysis: assess whether alternative catalysts reduce material supply risks at scale.
- Evidence standards Our analysis: distinguish laboratory capacity gains from proven battery durability.
Image: AI-generated abstract illustration of battery research; not a photograph of the Surrey study or its equipment.