Overlooked residue of Li-ion battery recycling waste as high-value bifunctional oxygen electrocatalyst for Zn-air batteries

Kerli Liivand*, Jani Sainio, Benjamin P. Wilson, Ivar Kruusenberg, Mari Lundström

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
113 Downloads (Pure)

Abstract

Continuously increasing production of Li-ion batteries (LIBs) for the Green Transition is underlined by the absence of feasible recycling methods for graphite, regardless of its criticality as a raw material. The current study demonstrates a novel strategy to valorize waste graphite as a valuable raw material in oxygen electrocatalyst production. Industrially produced LIBs post-metallurgical leach residue was transformed into highly active bifunctional oxygen electrocatalyst, which was subsequently successfully applied as an active catalyst for Zn-air batteries. Moreover, produced graphene-like material was in-situ doped by the impurity cobalt present in the recycling residue. The resultant Zn-air battery was shown to deliver a high specific capacity of 719 mA h g-1, peak power density of 112.8 mW cm-2 and could be cycled over 400 times. Results clearly demonstrate that an often-neglected LIB recycling waste fraction can be a valuable source for electrocatalysts production required in metal-air batteries and regenerative fuel cells.

Original languageEnglish
Article number122767
Number of pages10
JournalApplied Catalysis B: Environmental
Volume332
Early online date15 Apr 2023
DOIs
Publication statusPublished - 5 Sept 2023
MoE publication typeA1 Journal article-refereed

Keywords

  • Bifunctional oxygen electrocatalyst
  • Li-ion battery recycling
  • Metal-air battery
  • Oxygen reduction reaction
  • Spent graphite

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