Sodium-ion is not a worse lithium-ion. It is a different chemistry with a different cost structure that wins where energy density does not bind: grid storage, cold climates, and cheap short-range mobility. We walk the electrochemistry, the honest energy-density penalty, the genuine 2025-2026 deployments from CATL, BYD, and HiNa, and the one variable that decides whether it ever undercuts LFP: the price of lithium.
Lfp
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Sodium-Ion Batteries -
Li-ion Chemistry, Honestly The choice between LFP, NMC, and NCA cathode chemistries is the single most consequential decision in any modern lithium-ion battery pack, and it explains nearly every visible trend in the EV market. We walk the cathode physics, the energy-density-versus-everything-else trade-offs, why LFP is taking over passenger EVs, and the honest cell-level numbers.