Preparation method of lithium-rich manganese-based lithium battery

• Main Authors: XU DANJUN, LI WEI
• Format: Patent
• Language: Chinese; English
• Published: 30.09.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a lithium-rich manganese-based lithium battery preparation method, which comprises: (1) adding polyvinylidene fluoride and a graphene modified lithium-rich manganese-based material into N-methyl pyrrolidone, and mixing to obtain a positive electrode slurry; wherein the mass ratio of the polyvinylidene fluoride to the graphene modified lithium-rich manganese-based material is (2.5 to 4.5): (95.5 to 97.5); (2) sodium carboxymethyl cellulose, a binder and graphite are added into deionized water to be mixed, and negative electrode slurry is obtained; wherein the mass ratio of the sodium carboxymethyl cellulose to the binder to the graphite is (1.5-2.5): (2-3): (94.5-96.5); and (3) coating, baking and rolling the positive electrode slurry and the negative electrode slurry to obtain a positive plate and a negative plate, and carrying out die cutting, powder brushing and assembling to obtain the lithium-rich manganese-based lithium battery. The lithium-rich manganese-based lithium battery has