Testing on 16850Seems the cell size used for testing is popular
US military is mandating Nanograf (Chicago) for silicon development.
Reference:
«
NanoGraf Completes UL1642 and IEC62133 Global Safety Certifications for World’s Most Energy-Dense 18650 Lithium-ion Cell
Company to produce 35 tons of silicon anode material per year, enough to supply 24 million Lithium-ion cells to U.S. Military»
This NR is dated December 2023. Interesting nevertheless.