Sustainable upcycling of mixed spent cathodes to a high-voltage polyanionic cathode material

Abstract Sustainable battery recycling is essential for achieving resource conservation and alleviating environmental issues. Many open/closed-loop strategies for critical metal recycling or direct recovery aim at a single component, and the reuse of mixed cathode materials is a significant challenge. To address this barrier, here we propose an upcycling strategy for spent LiFePO 4 and Mn-rich cathodes by structural design and transition metal replacement, for which uses a green deep eutectic solvent to regenerate a high-voltage polyanionic cathode material. This process ensures the complete recycling of all the elements in mixed cathodes and the deep eutectic solvent can be reused. The regenerated LiFe 0.5 Mn…

• NN
  National Natural Science Foundation of China

  Awards: 52302285, U21A20174
• SJ
  Shanghai Jiao Tong University
• DO
  Division of Materials Research
• TS
  Tsinghua Shenzhen International Graduate School