Battery knowledge · Lithium-ion chemistries and cell formats
NCMA
A quaternary layered oxide that adds a little aluminium to a high-nickel NMC, typically around 90 % nickel with only a few percent cobalt. Aluminium steadies the lattice and slows degradation, much as in NCA, so the material keeps high capacity with less cobalt; LG Energy Solution supplied it for GM’s Ultium cells.
- Also called
- nickel cobalt manganese aluminium oxide, quaternary cathode, LiNiCoMnAlO₂
Example
Lithium-ion chemistries and cell formats: an example situation
Two cylindrical cells can share dimensions yet differ in cathode, capacity and current limits.
Read NCMA alongside Cobalt in this context. The metal that stabilises layered-oxide cathodes, mined largely in the Democratic Republic of Congo under scrutiny for working conditions. Its price and ethics have driven the industry from LCO and NMC111 towards high-nickel and cobalt-free LFP.
Use in Lemonergy
Separate chemistry from form factor.
This is a reference concept. No executable Lemonergy block has been verified for this term.
References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- A reflection on lithium-ion battery cathode chemistry
Arumugam Manthiram · Nature Communications · 2020
Topic background · Layered oxides, spinels and polyanion cathodes; links between composition, structure and performance.