Direct regeneration of degraded lithium-ion battery cathodes with a multifunctional organic lithium salt

Abstract The recycling of spent lithium-ion batteries is an effective approach to alleviating environmental concerns and promoting resource conservation. LiFePO 4 batteries have been widely used in electric vehicles and energy storage stations. Currently, lithium loss, resulting in formation of Fe(III) phase, is mainly responsible for the capacity fade of LiFePO 4 cathode. Another factor is poor electrical conductivity that limits its rate capability. Here, we report the use of a multifunctional organic lithium salt (3,4-dihydroxybenzonitrile dilithium) to restore spent LiFePO 4 cathode by direct regeneration. The degraded LiFePO 4 particles are well coupled with the functional groups of the organic lithium…

• NN
  National Natural Science Foundation of China

  Award: U21A20174
• SJ
  Shanghai Jiao Tong University
• ST
  Science, Technology and Innovation Commission of Shenzhen Municipality

  Award: KQTD20210811090112002
• NJ
  NSAF Joint Fund

  Award: U21A20174
• NK
  National Key Research and Development Program of China

  Awards: U21A20174, 2019YFA0705700
• TS
  Tsinghua Shenzhen International Graduate School