A Cost-Effective All-In-One Halide Material for All-Solid-State Batteries
September 15, 2025
Schematic of the brittle-to-ductile transition of the LixFe1.2Cl4 electrode and the self-healing of the mechanical failures.
Scientific Achievement
We have demonstrated the halide material Li1.3Fe1.2Cl4 with high Li+/e− conductivities to fabricate all-in-one cathode electrodes for All-Solid-State Batteries (ASSBs).
Significance and Impact
Functioning as a trinity of cathode, catholyte, and electronic conductor, Li1.3Fe1.2Cl4 simplifies fabrication, cuts costs, and achieves high energy densities. Leveraging abundant, low-cost iron, this work provides a sustainable, practical path to competitive ASSBs.
Research Details
- Combined neutron and x-ray diffraction study reveals the crystal structure of Li1.3Fe1.2Cl4 and its structural transition during the electrochemical process.
- A brittle-to-ductile transition and self-healing behaviors were revealed during the charging process of the halide cathode material, associated with decreased melting point and enhanced cation local migration.
“A cost-effective all-in-one halide material for all-solid-state batteries,” Nature 643,111–118 (2025)
https://doi.org/10.1038/s41586-025-09153-1
