fig6
![Recycling valuable materials from the spent lithium ion batteries to catalysts: methods, applications, and characterization](https://image.oaes.cc/df092ec8-532d-4026-b0bd-55557e43efb0/cs3066.fig.6.jpg)
Figure 6. (A) Schematic illustration of the CoFe/C catalyst cathode synthesis from spent LIBs to optimize Zn-air batteries. Quoted with permission from Jiao et al.[60]; (B) The route of recycling spent LIBs to prepare Co@NG catalyst. Quoted with permission from Serbara Bejigo et al.[61]. LIBs: Lithium-ion batteries.