Preparation and electrochemical properties of Li-rich spinel-type lithium manganate coated LiMn2O4

Li-rich spinel-type lithium manganate (SC) coated LiMn2O4 composites were prepared and characterized by XRD, SEM, FT-IR, ICP, etc. Their charge/discharge behaviors were studied between 3.0 and 4.3 V at 40 mA g−1 under room temperature, and the results showed that SC coated on surface of LiMn2O4 could improve cycling stability of composite electrodes. The composite (S1) containing 4.8 wt% of SC exhibited noticeably improved cycling stability, whereas the initial specific capacity was very close to that of LiMn2O4.

Graphical abstractComposites in which Li-rich spinel-type lithium manganate was coated on surface of LiMn2O4 particles were prepared, and the cycling stabilities of composites were much improved.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A composite of Li-rich spinel-type lithium manganate and LiMn2O4. ► Li-rich spinel-type lithium manganate coating on the surface of LiMn2O4 particles. ► A synthetic method of sol–gel followed by heating. ► Improved cycling stability without large degradation of initial capacity.