Enhanced cycling stability of lithium-rich manganese-based cathodes via gradient modification of Mn2O3

Lithium-rich manganese-based cathodes (LR) hold promise for high-performance energy storage systems due to their high specific capacity and energy density. However, challenges such as particle fragmentation and structural degradation during cycling have limited their practical application. In this study, we present a novel gradient modification approach employing Mn 2 O 3 on LR materials to mitigate these challenges. Through advanced characterization techniques including Focused Ion Beam Transmission Electron Microscopy (FIB-TEM), and X-ray Photoelectron Spectroscopy (XPS), we confirm the successful implementation of the gradient coating, with modification depths ranging from 1 to 1.5 μm. Our results demonstrate that this gradient modification effectively alleviates stress between particles, enhances Li + conductivity, and improves cycling stability. The coated LR materials exhibit enhanced electrochemical performance and prolonged cycle life, making them promising candidates for advanced energy storage applications. This work underscores the significance of surface modification strategies in enhancing the performance and stability of lithium-rich manganese-based cathodes for next-generation energy storage systems.