Unfortunately, 4870 format battery chemistry is still unknownI...

Unfortunately, 4870 format battery chemistry is still unknown
I can only guess Its high nickel NCM or NCMA 811 could be more than 80% of Nickel.

Nickel
BHP
https://www.bhp.com/news/media-centre/releases/2021/07/bhp-enters-into-nickel-supply-agreement-with-tesla-inc

Lithium Hydroxide
Ganfeng
https://www.reuters.com/business/autos-transportation/chinas-ganfeng-lithium-inks-lithium-battery-supply-contract-with-tesla-2021-11-01/
Pidmont
https://www.businesswire.com/news/home/20200928005208/en/Piedmont-Lithium-Signs-Sales-Agreement-With-Tesla

There have been big movement on reducing cobalt on cathode.
Still R&D stages.

https://nickelinstitute.org/about-nickel/nickel-in-batteries/high-nickel-cathodes-an-overview/

Dr. Manthiram’s group at University of Texas at Austin has been extensively working on the development of high Ni cathodes and has gone from 94% Ni and 6% Co (cobalt) in their cathode to a Co-free composition. They demonstrated that the performance integrity can be preserved without Co. One such example attained by their efforts is the high‐nickel NMA (LiNi1-x-yMnxAlyO2) which is a cobalt‐free alternative to NMC and NCA cathodes for lithium‐ion batteries.They performed a comparative study on various high nickel-containing cathode compositions: NMA-89, NMC-89, NCA-89, and Al-Mg co-doped NMC (NMCAM-89) where 89 refers to 89% nickel content. The corresponding initial discharge capacities were 216, 226, 220, 213 mAh g-1, respectively. NMA-89 exhibits a higher average operating voltage vis a vis NMC-89 despite the lower capacity.



One other strategy is employing single crystals. With a single crystal, the major advantage is that you can reduce surface activity; it may also reduce residual lithium. For example, Dr. Dahn’s group at Dalhousie University took SEM (scanning electron microscopy) images of cross-sections of cathode particles from single-crystal NMC 811 after 1100 cycles, and they showed no sign of cracking which is a testimony to the efficacy of the single-crystal strategy.

Single-Crystal Cathode currently developing by NOVONIX.