Application of enzyme-like MnO2 nanoparticles as cathode materials for Li-ion batteries

In this study, the enzyme-like manganese dioxide nanoparticles with high peroxidase-like activity were synthesized and then characterized. The experimental studies proved the high Li-electroactivity of the as-prepared nanoparticles which makes these nanozymes for applying as cathode materials for Li-ion batteries. To determine the redox peaks of Mn4+/Mn3+ against Li anode, the cyclic voltammetry was used, revealed that the enzyme-like manganese dioxide nanoparticles as cathode materials can receive the Li(I) ions and then give it back to the anode. The charge-discharge tests were performed for several successive operational cycles. The results showed that the capacity of enzyme-like manganese dioxide nanoparticles is as high as 164.9 mAhg−1 at 30 mAg−1 while at 1000 mAg−1 the capacity was found to be about 46 mAhg−1.