Tesla’s 4680 Cells Are Worse Than Those In Regular Batteries

However, that’s not all UC San Diego found when examining the battery cell. Researchers found the 4680 battery has more contains more cobalt than comparable batteries. “The Tesla cell uses much more cobalt and less nickel. This is an area where Tesla will need to improve in the future,” explains the presenter.”Cobalt [has a] lower energy density than nickel, is more expensive, and carries more public relations risk.” The last point refers to the heightened risk of electric vehicle fires, which can quickly spiral out of control and prove difficult to extinguish.It’s not all darkness and gloom, however. Should Tesla redesign the battery to use silicon in the anode, the adjusted energy density would increase to 280-292 Wh/kg. “The 4680 [cell] has greater potential energy density when it starts using even a small amount of silicon.”

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