Utilizing egg lecithin coating to improve the electrochemical performance of regenerated lithium iron phosphate

摘要: Abstract A series of egg lecithin coating LiFePO4 composites have been prepared by a simple mechanochemistry activation and sintering processes using the regenerated as raw materials. The mechanical forces high energy ball milling induced or chemical changes different components. as-prepared showed stable (C+N+P) co-coating layers with N-C P-C bonds wrapped particles smaller uniform particle sizes, which can shorten diffusion distance lithium ions electrons, offer good electronic conduction between particles. LiFePO4/C composite 15% exhibited average specific capacities 164.9 mAh g−1 at low C-rate 0.2 C; 5 C, electrode deliver capacity 120 mAh retention 93% after 100 cycles; even rate 20 C, this materials still keep 100.7 mAh g−1, is 41% greater than its pristine counterpart. More interestingly, material in work recycled produced from spent power batteries, also demonstrates greatly potential approach to utilize batteries into high-performance cathode for Li-ion applications.