Radical Anion-Driven Electron-Ion Coupled Repair Chemistry for Direct Regeneration of Degraded LiFePO4 Cathodes.

Key Points

• The aim is to explore a new method for regenerating degraded lithium iron phosphate cathodes using radical anions.
• Developed a radical-anion-driven repair chemistry approach.
• Tested the capacity retention of regenerated cathodes over 650 cycles at 1C.
• Evaluated performance at a high rate of 5C.
• Achieved 92% capacity retention after 650 cycles at 1C.
• Maintained excellent stability at a high discharge rate of 5C.
• Proved effective for severely degraded cathodes.