Influence of graphene wrapped-cerium oxide coating on spherical LiNi0.5Mn1.5O4 particles as cathode in high-voltage lithium-ion batteries

Cobalt-free ?LiNi0.5Mn1.5O4 (Lithium Nickel Manganese Oxide; LNMO) has garnered considerable interest as a cathode material due to its high working voltage, lower cost, and environmental friendliness. However, LNMO cathodes currently exhibit low cyclability capacity deterioration, severely restricting their use on broader scale. To this end, microwave-assisted chemical co-precipitation was used produce spherical aggregated nanoparticles of LiNi0.5Mn1.5O4 (LNMO) coated with CeO2 (LNMO-Ce) wrapped in graphene (LNMO-Ce-GO). Structural analysis demonstrates that the ceria coating along wrapping prevents unwanted phases from forming altering morphology microspheres. LNMO-Ce-GO exhibits discharge 132.4 mAhg?1 at C/10 rate retention 95.3 % after 100 cycles, compared LNMO-Ce bare samples provide 91.6 84.7 respectively. DSC elucidate helps suppress adverse reactions electrode/electrolyte interface reduce Mn3+ dissolution Jahn Teller effect, increasing cell cyclability. The reduces aggregation provides conductive pathways significantly improve electrochemical performance cathode. This innovative design strategy can be efficiently expanded other classes lithium-ion battery materials enhance performance.