DOI: 10.1039/d6ta05623g ISSN: 2050-7488
Homogeneous regeneration of spent LiFePO 4 via in situ Al/F impurity introduction: tailoring Li–Fe anti-sites for great cycling stability
Liujia Lan, Wei Bao, Fanbing Meng, Yinghui Ma, Zihao Zeng, Hanyu Zhou, Jiexiang Li, Wei Sun, Peng Ge, Yang YueTrace Al/F co-doping in spent LiFePO 4 regulates antisite defects, reduces charge-transfer resistance and accelerates Li + diffusion. The regenerated cathode delivers 141.78 mAh g −1 at 1.0C and retains over 90% capacity after 500 cycles.