Boosting the Electrochemical Performance of Regenerated LiCoO 2 Cathode v ia LiMgPO 4 Coating and Mg Doping

作者：Xiaochen Liu, Zeqiang Zheng, Dong Xie, Zhenya Liu, Qisheng Li, Shoushan Wang, Shilei Xie, Faliang Cheng · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2025 · DOI：10.1021/acssuschemeng.5c02282 · 被引用次数：5 · 研究领域：Advancements in Battery Materials、Extraction and Separation Processes、Advanced Battery Technologies Research

With the global shift toward renewable energy, the demand for lithium-ion batteries has surged, drawing increasing attention to the recycling of spent lithium-ion batteries. This study proposes an integrated recycling and modification strategy for regenerating LiCoO 2 cathode materials from spent lithium-ion batteries. The approach involves pretreatment, water leaching, and a LiMgPO 4 coating combined with Mg doping, thereby synthesizing a Mg-doped and LiMgPO 4 -coated LiCoO 2 cathode material (MLMP-LCO). The introduction of the LiMgPO 4 coating and Mg doping significantly enhances the structural and interfacial stability of LiCoO 2 under high-voltage conditions (4.5 V). Electrochemical tests indicate that at 0.5C, the MLMP-LCO cathode exhibits a high discharge specific capacity of 175.64 mAh/g, and after 100 cycles, its capacity retention reaches 97.42%, demonstrating excellent cycling stability. This work underscores the potential of a combined recycling and modification strategy to enhance the electrochemical performance of regenerated cathode materials, thereby offering a robust technological solution to address both the environmental and resource challenges posed by spent lithium-ion batteries and to advance sustainable energy storage applications.