Mullen Automotive will integrate solid-state polymer battery technology into its commercial Class 1 EV cargo van. The van presently features a 46kW lithium-ion battery pack that enables it to travel 177km on a single charge. However, it is expected that the van will be capable of over 322km on a full charge with the integration of solid-state polymer technology.

This technology delivers higher energy density and faster charging times and is more compact and safer than conventional lithium-ion cells. Mullen Automotive will test this technology in its Class 1 EV cargo vans starting in Q4 2023.
Solid-state polymer batteries
Solid-state polymer batteries are considered the next generation of battery technology and are being seen as a potential replacement for lithium-ion batteries.
They use a solid electrolyte instead of the liquid electrolyte found in lithium-ion batteries, which makes them more stable and less prone to overheating.
This technology is currently in the research and development stage and has the potential to offer even higher energy density, longer lifespan, and faster charging times than current lithium-ion batteries. Several companies are investing in solid-state battery technology, and it is expected to play a significant role in the future of electric vehicles and other energy storage applications.
source: https://www.automotivetestingtechnologyinternational.com/