US all-solid-state sulfur EV battery retains over 80% capacity after 450 cycles

Researchers at Argonne National Laboratory and the University of Chicago used high-speed mixing to trigger halide segregation in all-solid-state sulfur batteries.

The treatment improved the cathode-electrolyte interface, allowing the cells to retain more than 80% capacity after 450 cycles at room temperature.

The same approach also showed promise for selenium and tellurium cathodes.

The findings suggest a simpler route to longer-lasting, higher-energy solid-state batteries built from lower-cost, abundant materials.