H₂-rich syngas production through separator pyrolysis over LiNi_1/3Co_1/3Mn_1/3O₂ pre-catalysts derived from spent lithium-ion batteries

The proper recycling of spent lithium-ion batteries (LIBs) is critical for both economic and environmental sustainability. This work proposes using the endogenous separator of spent LIBs as an energy material and the LiNi_1/3Co_1/3Mn_1/3O₂ pre-catalyst from the cathode material as a catalyst for catalytic reforming to produce H₂-rich syngas. The separator pyrolysis gas promoted the formation of Li₂CO₃ and reduced transition metals in the pre-catalyst, resulting in a more robust NiCo alloy and MnO with good catalytic activity and thermostability in terms of H₂ yield. The maximum H₂ yield and selectivity were 40.19 mmol·g_sep.⁻¹ and 54.26 % at 800 °C, respectively. The H₂ yield and selectivity during 10 cycle reaction ranged from 20-40 mmol·g_sep.⁻¹ and 40–50 %, respectively, with no carbon deposits on the catalyst surface. The work presents novel formulations and new insights into the endogenous recycling of spent LIBs.