Materials study demonstrates 588.8 Wh kg–1 energy density in all-solid-state lithium batteries using active halide cathodes, highlighting a scalable path for low-cost energy storage.
Key Points
Investigate a catholyte-free composite cathode design pairing active Li3TiCl6 with low-cost LiMn2O4 to resolve energy density limits and cycling degradation in all-solid-state lithium batteries.
Replaced conventional inert catholytes with an electrochemically active halide material (Li3TiCl6) mixed with LiMn2O4 to form a catholyte-free composite cathode.
Fabricated all-solid-state lithium pouch batteries and tested their structural evolution and performance under deep charge and discharge cycling.
Titanium from the halide cathode inserted into the LiMn2O4 lattice during cycling, mitigating Jahn-Teller distortion and elevating discharge specific capacity to 316.3 mAh g–1.
All-solid-state pouch batteries delivered a gravimetric energy density of 588.8 Wh kg–1, achieving a 2.3-fold improvement over conventional catholyte-based systems (256.8 Wh kg–1).