strong textAn official statement from Talent New Energy has claimed that the new solid-state lithium battery cell offers a capacity of 120 Ah, and an energy density of 720 Wh/kg in April 2024. This achievement sets an industry records for lithium battery capacity and energy density.
The newly released separator-free technology can be applied to both all-solid-state and semi-solid batteries, and it is compatible with various high-energy cathode and anode materials, allowing for flexible energy density customization, higher-level battery safety innovation, and comprehensive performance.strong text
For comparison. Most high density li-ion cells are about 340 wh/kg. The Li-po cells being used in the entry level Model 3’s are about 150 or so wh/kg and the newest CATL solid state cells that are in Beta Testing are about 500 wh/kg.
Side Note: I recall an official from CATL saying a year or so ago that solid state was a dead end. I find it odd that CATL is so far along on solid state.
For a comparison to ICE. The newest Cummins 6.7 liter diesel engine weighs in at about 500 kg. Chevy has shown that to get reasonable range (400 plus miles not towing) that you need a 200 kw hour pack. At 150 wh/kg you need about a 1300 kilogram pack. At 500 wh/kg you need about 400 kilograms pack . At 720 wh/kg you only need 250 kilograms.
This light weight puts you in the same class as the aluminum block Chevy 6.2 liter engine. This is used in the Chevy 1500 and the Corvette.
Now for the wiggle room. CATL is not mass producing solid state cells and is projecting late 2020’s for mass production and these will not be cheap cells. Second, I am assuming energy density at the pack level, probably not what is being quoted. Third, the 720 wh/kw cell is even to beta testing.
Cheers
Qazulight