Battery cell, method of manufacturing the same, battery device, and electric device

Abstract

The application belongs to the technical field of batteries, and specifically discloses a battery monomer, a preparation method of the battery monomer, a battery device and a power utilization device. The battery monomer comprises a positive electrode sheet, and the positive electrode sheet comprises a positive electrode film layer. The positive electrode film layer comprises a first region close to a current collector and a second region away from the current collector. The first region contains a lithium-nickel transition metal oxide, and the second region contains a lithium-containing phosphate and second carbon nanotubes. The design provided in the application improves the cycle service life of the battery by reducing the expansion degree of the positive electrode sheet.

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