講演情報
[14p-P07-37]Sustainable Battery Recycling via Direct Regeneration of Lithium Iron Phosphate Cathodes
〇(M2)Muhammad Aqil Hasani1, Wei-Fan Kuan1,2 (1.Department of Chemical and Materials Engineering, Chang Gung University, 2.Center for Sustainability and Energy Technologies)
キーワード：
Battery recycling、Lithium iron phosphate、Direct regeneration
Lithium iron phosphate (LFP) is a widely used lithium-ion battery cathode material due to its stability and safety. However, repeated cycling causes lithium loss and performance degradation, resulting in battery waste. Conventional recycling methods such as pyrometallurgy and hydrometallurgy are energy-intensive and environmentally harmful, making them unsustainable for a closed-loop battery economy. This study explores the direct regeneration of delithiated LFP (D-LFP) using a solid-state reaction to produce regenerated LFP (R-LFP). This approach restores lithium and repairs the material's structure without changing its morphology. XRD analysis confirmed the restoration of the crystal structure, and ICP measurements indicated a Fe:Li ratio recovery from 1:0.02 (D-LFP) to 1:1.2 (R-LFP). Battery cycling tests showed R-LFP recovering 70 percent of the pristine capacity, achieving 110 mAh/g at 0.2 C and 60 mAh/g at 10 C. These findings demonstrate the potential of solid-state methods for sustainable LFP battery recycling.