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<p>With the increasing energy problems and environmental pollution, lithium-ion batteries have gradually become the preferred power source for new energy vehicles due to their high energy density. With the global popularity of lithium-ion batteries, the heavy metal pollution and resource waste caused by spent batteries are becoming more and more obvious, and as a result, research on recycling treatment and resource utilization technology is critical. In this study, the leaching treatment of waste ternary cathode materials was carried out by using a H<sub>2</sub>SO<sub>4</sub>-H<sub>2</sub>O<sub>2</sub> leaching system, and the recycled metal elements were used as raw materials for subsequent synthesis. The NCM622 precursor (Ni<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>(OH)<sub>2</sub>) and Li<sub>2</sub>CO<sub>3</sub> were prepared by the co-precipitation method, and the high-performance NCM622-type (LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub>) cathode materials were regenerated by argon-oxygen mixed gas calcination at 850°C after pre-oxidation treatment. The materials exhibited excellent electrochemical performance, with capacity retention as high as 91% after 100 cycles at 0.2C current density, thus demonstrating the ability of this process to achieve high-performance regeneration of NCM622-type cathode materials.</p>

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High-Performance Regenerated LiNi0.6Co0.2Mn0.2O2 Cathode Material Realized by Argon-Oxygen Mixed Gas Calcination

  • 期刊论文

  • 发表日期：

    2025年4月28日

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  • Yunlong Duan,
  • Liying Guo,
  • Xiao Zhang,
  • Xudong Zhao,
  • Linnan Zhang

摘要

With the increasing energy problems and environmental pollution, lithium-ion batteries have gradually become the preferred power source for new energy vehicles due to their high energy density. With the global popularity of lithium-ion batteries, the heavy metal pollution and resource waste caused by spent batteries are becoming more and more obvious, and as a result, research on recycling treatment and resource utilization technology is critical. In this study, the leaching treatment of waste ternary cathode materials was carried out by using a H2SO4-H2O2 leaching system, and the recycled metal elements were used as raw materials for subsequent synthesis. The NCM622 precursor (Ni0.6Co0.2Mn0.2(OH)2) and Li2CO3 were prepared by the co-precipitation method, and the high-performance NCM622-type (LiNi0.6Co0.2Mn0.2O2) cathode materials were regenerated by argon-oxygen mixed gas calcination at 850°C after pre-oxidation treatment. The materials exhibited excellent electrochemical performance, with capacity retention as high as 91% after 100 cycles at 0.2C current density, thus demonstrating the ability of this process to achieve high-performance regeneration of NCM622-type cathode materials.