▎ 摘　　要

NOVELTY - Preparing lithium-rich manganese-based lithium battery comprises (i) adding polyvinylidene fluoride and graphene-modified lithium-rich manganese-based materials into N-methylpyrrolidone, and uniformly mixing to obtain anode slurry, (ii) adding sodium carboxymethyl cellulose, binder, and graphite into deionized water, and uniformly mixing to obtain cathode slurry, (iii) uniformly applying obtained anode slurry and cathode slurry to anode current collector and cathode current collector, baking and rolling to obtain anode sheet and cathode sheet, (iv) carrying out die-cutting, powder painting and lamination processing on obtained positive pole piece and negative pole piece to obtain electric core, and (v) assembling obtained batteries, injecting liquid, forming, aging and volumetricizing to obtain lithium-rich manganese-based lithium battery. USE - The method is useful for preparing lithium-rich manganese-based lithium battery. ADVANTAGE - The battery: has high initial charge and discharge efficacy and long cycle life, 5C rate charge and discharge test; has 93.5% first charge and discharge efficiency, 3200 times cycle, 80% capacity retention rate, 10C rate charge and discharge test, and 1700 times cycle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for lithium-rich manganese-based lithium battery, prepared by above method.