Sodium-ion — the chemistry waiting behind LFP

Sodium is abundant and cheap, and sodium-ion cells avoid lithium, cobalt and nickel entirely. The chemistry has been demonstrated at scale by Chinese cell manufacturers and has appeared in small city cars and in stationary storage in China before reaching Europe.

Why it matters when buying

Two properties make it interesting rather than merely cheap. It holds usable capacity far better at low temperatures than lithium chemistries, and it tolerates fast charging at those temperatures where an LFP pack would have to warm itself first. For a small car used in a cold climate, that combination addresses the exact complaint owners raise most often.

The limitation is energy density, which sits below LFP and well below NMC. That confines the chemistry to short-range vehicles for now, and makes early sodium-ion cars a category of their own rather than cheaper versions of existing ones.

Nothing on sale in Europe uses it at the time of writing. It appears here because it is the most likely source of the next shift in what a cheap electric car looks like, and because buyers comparing entry-level Chinese models will start seeing the term in press coverage before they see it in a price list.

Related: LFP · NMC · preconditioning