For anyone familiar with lithium iron phosphate who is wondering: they did in fact improve the energy density over typical LFP:
To improve the energy density, CATL introduced its in-house 3D honeycomb material. As a result, the Shenxing Plus has an energy density of 205 Wh/kg, comparable to most traditional NCM batteries.
https://electrek.co/2024/04/25/catl-unveils-worlds-first-lfp-battery-4c-ultra-fast-charging/
And without compromising on charging speed:
CATL claims the new EV battery is the world’s first with 4C ultra-fast charging and +620 miles (1,000 km) CLTC range.
They must be doing some serious cooling