R&D Watch: Solid-State and Sodium-Ion — The Next Storage Chemistries

LFP dominates today, but the R&D frontier is crowded. Solid-state cells promise higher energy density and safety; sodium-ion offers a low-cost, resource-abundant alternative for stationary storage where weight is not the constraint.

For asset owners, the practical question is timing. Building an augmentation strategy today means underwriting the chemistry roadmap — leaving room to adopt cheaper, denser cells at replacement without stranding the balance-of-plant.

The R&D signal to watch: cycle-life and calendar-life data at grid scale, not lab-cell headlines. Bankability follows demonstrated durability, not press releases.