This guide covers the four chemistries that matter for commercial OEM applications in 2026: LFP, LMFP, NMC, and NCA. For each, we cover what it actually offers, where it falls short, and which vehicle applications it is genuinely suited to.
At IONETIC, chemistry selection is not a manual process. Our Arc software platform evaluates cells across all compatible chemistries simultaneously, running comparative simulations against your vehicle brief, packaging constraints, duty cycle, and programme economics. The output is a chemistry and cell recommendation specific to your vehicle, not a default position based on what a supplier had available.
How a Lithium-Ion Battery Actually Works
Before getting into chemistries, it helps to understand the basic operating principle, because the chemistry is a consequence of it.
A lithium-ion cell consists of four functional components: a cathode (positive electrode), an anode (negative electrode), an electrolyte (the medium through which ions travel), and a separator (a porous membrane that keeps cathode and anode apart while allowing ions through).
When a cell is charged, lithium ions are extracted from the cathode material and travel through the electrolyte to intercalate into the anode. When the cell discharges, the process reverses: lithium ions migrate back from the anode to the cathode, releasing energy.
The cathode material is where the four chemistries diverge. It governs the voltage, the number of ions that can be stored per unit mass or volume, and the stability of the structure under repeated cycling and thermal stress.
The anode in all four chemistries is graphite. The electrolyte is a lithium salt dissolved in an organic carbonate solvent. It is flammable, which is a key driver of thermal runaway risk, particularly in NMC and NCA cells.
What "Chemistry" Actually Means: The Cathode in Plain Terms
When engineers and manufacturers refer to battery chemistry, they are almost always referring to the cathode material.
LFP · LiFePO4
Uses a lithium iron phosphate cathode with an olivine crystal structure. Iron and phosphate form a very stable bond, which is why LFP resists thermal runaway. The trade-off is that this structural stability limits the voltage (3.2 V nominal) and therefore the energy density.
LMFP · LiMn1-xFexPO4
A modified version of LFP where some of the iron is replaced with manganese. This raises the nominal voltage to around 3.6 to 3.8 V, lifting energy density by 15 to 25% compared to LFP while retaining the same olivine structure and most of LFP's safety characteristics.
NMC · LiNiMnCoO2
Uses a layered oxide cathode with nickel, manganese, and cobalt in varying ratios. NMC 811 (80% Ni, 10% Mn, 10% Co) is the dominant high-energy automotive formulation in 2026.
NCA · LiNiCoAlO2
Uses a layered oxide cathode with nickel, cobalt, and aluminium. The result is the highest power density of the four chemistries, at the cost of lower cycle life and the most demanding thermal management requirements.
Cell Format: Cylindrical, Prismatic, or Pouch?
Cylindrical cells
18650, 21700, and 46XX formats offer the most mature manufacturing route. Cylindrical cells are predominantly made with NCA or NMC.
Prismatic and blade cells
Achieve higher pack-level volumetric efficiency. LFP is almost exclusively manufactured in prismatic or blade format. LMFP is entering the market in prismatic and blade formats from the same manufacturers producing LFP.
Pouch cells
Offer the easiest route from lab to production. The trade-off is mechanical fragility. NMC pouch cells have been widely used in automotive programmes but now prismatic/blade are becoming more popular.
IONETIC works mainly in cylindrical and blade cells. Pack architecture selection is driven by the vehicle brief, packaging constraints, and the target cell chemistry.
The Five Things Chemistry Actually Determines
No chemistry wins on both axes. The right chemistry is the one shaped around your duty cycle.
LFP · Lithium Iron Phosphate
LFP is the most widely deployed chemistry in commercial and industrial EV applications. An LFP cell can deliver 4,000 to 10,000 cycles to 80% capacity and carries no cobalt or nickel.
Cell-level energy density sits at approximately 150 to 200 Wh/kg. For applications where cycle life and total cost of ownership dominate the business case, the energy density trade-off is well worth it.
LFP has the most forgiving thermal profile of any commercially available chemistry. Its olivine crystal structure resists decomposition under abuse conditions, making fault management significantly more tractable than for NMC or NCA.
IONETIC offers LFP through its cell-to-pack architecture for applications where cycle life, safety, and TCO outweigh gravimetric density. LFP and LMFP packs share a common mechanical envelope, so programmes can migrate to LMFP without redesigning the pack.
LMFP · Lithium Manganese Iron Phosphate
LMFP bridges most of the performance gap between LFP and NMC while retaining LFP's safety profile and cobalt-free supply chain. IONETIC's LMFP packs achieve 186 Wh/kg at pack level.
LMFP is priced at or near LFP parity in current market conditions. IONETIC designs LFP and LMFP into the same cell-to-pack architecture, so customers can swap chemistries without redesigning the pack.
Using our cell-to-pack architecture, you can have a pack that can swap between LFP and LMFP. Specify LFP today, upgrade to LMFP when the duty cycle calls for it. Same pack, same interfaces.
NMC · Nickel Manganese Cobalt
NMC is the dominant chemistry in passenger EV applications in Europe. At 250 to 300 Wh/kg, NMC allows pack designers to hit serious range figures in tightly constrained envelopes.
Cycle life sits at 1,000 to 2,000 cycles to 80% SoH adequate for most passenger BEV and PHEV programmes where annual mileage is moderate, but a limiting factor for high-utilisation fleet or commercial applications. The cost premium over LFP reflects the cobalt and nickel content: NMC carries meaningful exposure to cobalt pricing volatility and supply chain risk, which is a programme-level consideration for any vehicle. Where LMFP can meet the packaging and range brief, it will usually win on cost and supply chain grounds. NMC is the right call when the energy density gap between LMFP and NMC is the difference between a programme that works and one that doesn't.
IONETIC deploys NMC through its 2170 cylindrical architecture, aimed at high-energy and high-performance vehicle programmes. Arc evaluates NMC against LMFP for every automotive brief.
NCA · Nickel Cobalt Aluminium
NCA offers the highest combination of energy density and power density. Cycle life is NCA's principal weakness: typically 500 to 1,500 cycles to 80% SoH, making it unsuitable for any application requiring more than a few years of regular deep cycling.
IONETIC offers NCA through the same 2170 cylindrical architecture as its NMC packs. Chemistry choice becomes a cell-level decision, not a programme-level redesign.
Chemistry by Sector: Recommended Selection
Selection is always duty-cycle specific. These are starting points, not prescriptions.
Programme Impact
Choosing a chemistry allows you to trade variables to achieve your vision. The graphic below gives an indication of how each chemistry behaves and what might be best for your vehicle. If you want more power or energy, you have to sacrifice life or cost.
How IONETIC Designs Battery Packs From Chemistry to Production
Chemistry and cell selection
Handled by Arc, IONETIC's proprietary software platform. Arc runs the chemistry and cell selection process computationally, evaluating LFP, LMFP, NMC, and NCA against your vehicle brief, packaging envelope, duty cycle, performance requirements, and programme economics in parallel.
Pack architecture
Follows from chemistry and vehicle brief. IONETIC's cell-to-pack designs eliminate the traditional module layer, improving volumetric efficiency and reducing mass. Chemistry can be swapped without redesigning the pack.
Pack design and engineering
Executed through Arc's hardware and software stack, covering electrical architecture, structural integration, thermal management design, BMS specification, and production documentation.
Manufacturing
Takes place at IONETIC's ArcFab Pilot production facility, with ISO 9001 accreditation.
Specifying chemistry for a new EV programme?
A feasibility study with IONETIC typically resolves chemistry selection, pack architecture, and a development cost estimate within four to six weeks.
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