Lithium-rich manganese-based positive electrode material and preparation method thereof

• Main Authors: HE ZHAOSHU, CAI BIBO, SAI YA LE TU
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a lithium-rich manganese-based positive electrode material and a preparation method thereof, and relates to the technical field of lithium ion batteries, the lithium-rich manganese-based positive electrode material comprises the following components in percentage by mass: 65-72% of manganese salt, 12-20% of lithium salt, 3-6% of a conductive agent, 4-7% of a binder, 4-7% of an additive and 4-7% of a stabilizer, and the preparation method specifically comprises the following steps: preparing a solution; mixing the solution and precipitating; performing drying; calcining at high temperature; surface coating; and carrying out structural characterization and performance testing. According to the lithium-rich manganese-based positive electrode material prepared from the manganese salt, the lithium salt and other additives, the electrochemical performance of the material can be optimized, the additive can adjust the crystal structure and the ion transmission path of the material, and the cap