Short-Process Regeneration of Highly Stable Spherical LiCoO₂ Cathode Materials from Spent Lithium-Ion Batteries...

High-efficacy recycling of spent lithium cobalt oxide (LiCoO₂ ) batteries is one of the key tasks in realizing a global resource security strategy due to the rareness of lithium (Li) and cobalt (Co) resources. However, it is of great significance to develop the innovative recycle methods for spent LiCoO₂ , simultaneously realizing the efficient recovery of valuable elements and the regeneration of high-performance LiCoO₂ . Herein, a novel strategy of regenerating LiCoO₂ cathode is proposed, which involves the preparation of micro-spherical aluminum (Al)-doped lithium-lacked precursor (Li_2x Co_1-x-y Al_2/3y CO_3, remarked as "PLCAC") via ammonium bicarbonate coprecipitation. The comprehensive conditions affecting particle growth kinetics, morphology and particle size the has been investigated in detail by physical characterizations and electrochemical measurements. And the optimized Al-doped LiCoO₂ materials with high-density sphericity (LiCo_1-z Al_z O₂ , remarked as "LCAO") shows a high initial specific capacity of 161 mAh g^-1 at 0.1 C and excellent capacity retention of 99.5 % within 100 cycles at 1 C in the voltage range of 2.8 to 4.3 V. Our work provides valuable insights into the featured design of LiCoO₂ precursors and cathode materials from spent LiCoO₂ batteries, potentially guaranteeing the high-efficacy recycling and utilization of strategic resources.