Cobalt-Free Batteries: Can They Replace Cobalt in EVs?

Cobalt is the awkward ingredient in electric car batteries. It is costly, its supply is concentrated in a small number of countries, and a significant share of it is mined in conditions most buyers would not defend if they saw them. Every chemistry that removes cobalt is therefore interesting. The good news is that cobalt-free batteries are not a laboratory promise — they already power a large share of the electric cars sold worldwide. The harder question is how far they can go: which vehicles they suit, where they still fall short, and whether they can push cobalt out of the mainstream entirely.

Why cobalt is in the cathode at all

Nickel-rich layered oxide cathodes — the NMC and NCA families — store a lot of energy in a small mass, which is exactly what a car needs. Cobalt's job in that structure is unglamorous but important. It helps hold the layered crystal lattice together as lithium ions shuttle in and out, supporting long cycle life and keeping the cathode stable when it gets hot or is charged hard. Take cobalt out and you have to replace those functions with something else: more nickel, more manganese, a different crystal structure, or a protective coating.

Each substitution frees you from cobalt and costs you something — energy density, durability, safety margin or manufacturing complexity. That trade is the whole story.

The cobalt-free chemistries worth knowing

Lithium iron phosphate (LFP)

This is the mature answer. LFP uses iron and phosphorus instead of nickel, manganese and cobalt. Cells typically hold less energy per kilogram than nickel-rich rivals, so a pack is either heavier for the same range or shorter-range for the same weight. In exchange you get long cycle life, good tolerance of abuse, and materials that are cheap and widely available.

LFP has moved from budget cars into the mainstream — it is the default for many entry-level and mid-range models, and for most stationary storage. Its classic weaknesses are cold weather, where range and charging speed both suffer, and a very flat voltage curve that makes state-of-charge estimation fiddly for the battery management system.

Sodium-ion

Sodium-ion swaps lithium for sodium, pairing a hard carbon anode with an iron- or manganese-based cathode. Sodium is abundant and cheap. Energy density is lower — in current commercial designs, well below LFP — which makes it a natural fit for small city cars, two- and three-wheelers, and grid storage. Cold-weather behaviour tends to be more robust than LFP, and cells can be shipped and stored at very low voltage, which simplifies logistics. Some manufacturers blend sodium and lithium cells in one pack so different parts of the battery handle different temperatures and loads.

LMFP

Lithium manganese iron phosphate is LFP with manganese added. The manganese raises the operating voltage, so you get more energy from broadly similar materials while staying cobalt-free. The costs are lower electronic conductivity, manganese dissolution at high temperatures, and extra process steps. It is best seen as a boost to existing LFP platforms rather than a clean-sheet replacement.

High-voltage spinel (LNMO)

Lithium nickel manganese oxide is the most tantalising option for long-range cars: it operates at around 4.7 volts and can approach nickel-rich cathodes on energy per kilogram without any cobalt. The obstacles are practical. Conventional liquid electrolytes degrade at that voltage, cycle life suffers, and manufacturing yields are harder to control. Progress is real, but slower than the headlines suggest.

Manganese-rich layered oxides

Researchers continue to work on layered cathodes that lean heavily on manganese and nickel with little or no cobalt. Structural instability and voltage fade during cycling remain the sticking points. Treat these as promising rather than available.

Where cobalt-free cells still fall short

• Energy density and weight. A heavier pack means more energy used to move the car, which eats into the range advantage.
• Cold weather. LFP and several manganese chemistries lose capacity and accept charge more slowly in the cold. Preconditioning, heat pumps and careful charging planning matter more with these packs.
• Fast charging. Cobalt-free cells often taper earlier. The shape of the charging curve over a long journey tells you more than the peak kilowatt figure.
• Battery management. Flat voltage curves make it harder to know precisely how full the pack is, so the quality of the software and sensors counts for more.
• Substitute supply chains. Iron, manganese, sodium and phosphorus are abundant, but refining capacity and cathode plants take years to build.
• Recycling economics. Cobalt's value has helped fund battery recycling. A cobalt-free fleet is less lucrative to dismantle, so collection and design rules have to carry more of the weight.

What this means when you are choosing a car

Chemistry is not a scoreboard; it is a match to your driving. If you charge at home, rarely exceed a couple of hundred kilometres a day and live somewhere mild, an LFP pack is usually the sensible, longer-lasting choice. If you tow, cover long motorway distances in winter, or want the lightest pack for a given range, a nickel-rich chemistry with some cobalt may still earn its keep.

Useful checks before you buy:

1. Ask which cathode chemistry the pack uses, not just the brand name of the battery.
2. Look at the capacity warranty in years and kilometres, and what percentage retention it guarantees.
3. Search owner reports for winter range and charging speed at low temperatures.
4. Check whether the car has a heat pump or battery preconditioning if you live somewhere cold.
5. Remember that solid-state is a cell design, not a chemistry — it can still contain cobalt.

The division of labour is the likely outcome

Cobalt-free batteries will almost certainly dominate the highest-volume parts of the market: small and mid-sized cars, urban delivery vehicles, two-wheelers and stationary storage. That is where cost per kilowatt-hour, cycle life and simple supply chains beat raw energy density. Sodium-ion takes the cheapest tier; LFP and its manganese variants take the middle.

Nickel-rich chemistries with reduced but non-zero cobalt will hold on where every kilogram and every cold morning counts — long-range tourers, performance models and heavy vehicles. Cobalt demand will not disappear; it will shift. Aviation alloys, cutting tools and industrial catalysts also use it, and those sectors have no easy substitute.

How to judge a cobalt-free claim

When you see the phrase, ask three questions. Is it a production car or a concept? Which specific chemistry is used, and is the claim about the cathode, the cell or the whole pack? And what has been given up to get there — energy density, cold-weather performance, charging speed, or a longer warranty?

Answer those honestly and the picture becomes clear. Cobalt-free batteries are already good enough for most everyday driving, and they are improving. They will not replace cobalt everywhere, but in the segments that matter most for volume, they are well on their way to doing exactly that.

Photo: Kindel Media / Pexels