While the Munro Live team obtained a 4680 battery from a Model Y made in Texas that Munro & Associates bought, The Limiting Factor got its 4680 cell from Galileo Russell from Hyperchange. We have no idea how the Tesla investor and YouTuber managed to obtain a 4680 battery six months ago or even earlier than that. Both videos confirm that both versions of the 4680 battery use graphite, not silicon.
Another promise Musk made at the Tesla Battery Day was that the 4680 cells would use a cobalt-free, high-nickel cathode. Munro’s teardown analyzed the cathode and said it is a typical NMC 811 chemistry. In other words, it does not present two of the main advantages these cells would have. The Limiting Factor also stressed that the battery shell is three times thicker than that used in 2170 cells, dropping their energy density.
Ogan also asked about the dry battery electrode coating (DBE) technology Tesla was supposed to use in the 4680 cells more than a year ago. It is not clear if the dismantled cells use this technology, but Tesla would probably brag about that if it did. The only promise that seems to have been accomplished is the tabless design. For a battery that was supposed to give an incredible edge to Tesla, calling it disappointing is an understatement.
The first teardown of Tesla's 4680 battery cell is out, and as it turns out, reality does not match Battery Day expectations.— Taylor Ogan (@TaylorOgan) September 12, 2022
Battery Day: revolutionary silicon anode
Reality: graphite anode, like most other batteries pic.twitter.com/RLbaaijLA7
4/ Tesla has had trouble developing the DBE (dry battery electrode) — Maxwell's key technology. Again, Tesla can still make a 4680 cell without DBE, but it will be half the battery it unveiled at Battery Day.https://t.co/eY4W4Y14z0— Taylor Ogan (@TaylorOgan) May 20, 2021