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Table 4

Overall comparison of different routes followed in this study.

Recovery (%) 

 Route  Feed Sat. mag. (emu/g)  Yield (%) Li Co Mn Ni  Phases
Muffle furnace (ambient) L1- G 66.4 46.2 89 83 Co, CoO
  L1-C 60.3 46.9 52 86 Co, CoO
  L3-G 106.6 46.2 83 95 70 25 Co, CoO, MnO, Ni
  L3-C 83.6 34.8 31 66 32 51 Co, CoO, MnO, NiO
Tube furnace (argon) L1-G 129 43.7 76 95 Co
  L3-G 115 36.6 81 82 45 16 Co, MnO, Ni
Sulfuric acid leaching L3 + H2O2 28 82 89 27
Citric acid leaching L3 + H2O2 32 80 69 29

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