The US designates lithium metal a critical material
Policy caught up with the technology this month.
$500M into domestic lithium metal
The US Department of Energy committed $500 million through its Battery Materials Processing programme to a domestic lithium-metal supply chain, across seven recipients. Lithium metal foil is now designated a national critical material.
| Recipient | Award | Focus |
|---|---|---|
| Elevated Materials | $50M | Ultra-thin lithium films |
| Coreshell | $30M | Silicon |
| Lilac Solutions | $25M | Lithium extraction |
Elevated Materials, an Applied Materials spin-off specialising in ultra-thin lithium films by vapour deposition, paired its $50M award with a $100M new-plant investment. It reports a 3.5 GW/yr production target, over 250,000 m shipped in the past year, and more than 30 customers across EV, defence and storage.
A government naming ultra-thin lithium metal a critical material is a statement about where it believes next-generation cells end up. It is also the clearest signal yet that deposition capacity, not just chemistry, is considered strategic.
Separators stop being passive
Research from a team at Hanbat National University, published in Advanced Functional Materials in September, applied a Bikitaite zeolite separator (CBT) to a conventional liquid-electrolyte lithium-metal system.
| Metric | Result |
|---|---|
| Ionic conductivity | 3.45 × 10⁻³ S/cm (tLi⁺ 0.742) |
| 4C discharge capacity | 115 → 163 mAh/g |
| Cycle life | 2,500 cycles at 60% retention |
The notable part is that the separator improved cathode high-rate performance while also suppressing anode dendrites. Cellulose–zeolite composites are turning the separator from a barrier that prevents short circuits into an active controller of ion transport — a design element rather than a safety component.
Where this points
Public funding has effectively declared the destination: next-generation cells arrive at lithium metal and anode-free architectures. Meanwhile the academic shift toward active interface design means the hard part is no longer choosing the chemistry but engineering the interfaces around it. Both are process problems.