Composite modified lithium manganate positive electrode material and preparation method and application thereof

Abstract

This invention belongs to the field of battery materials, specifically disclosing a composite modified lithium manganese oxide cathode material, its preparation method, and its applications. The cathode material includes a core and a coating layer, wherein the coating layer coats at least a portion of the surface of the core; the core is a LiMn2O4 material, and the coating layer includes LiMn2O4. x Mn 2‑x The invention provides a composite coating structure that forms a synergistic system of core-layer ion transport, coating layer structural support, and electron conduction. This system ensures structural stability at high rates and improves electron transport efficiency through the coating layer. Simultaneously, the coating layer material does not increase lithium-ion transport resistance, reducing capacity loss and polarization, and further enhancing the electrochemical performance of the battery at high rates. (The O4 material and ZnMn2O4 material are mentioned, but their relevance to the main text is unclear.)

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