Lithium ion battery, preparation method thereof, positive pole piece and power utilization device

The invention provides a lithium ion battery and a preparation method thereof, a positive pole piece and a power utilization device. The lithium ion battery comprises a positive pole piece, the positive pole piece comprises a positive active layer, and the positive active layer comprises a positive active material, a dispersing agent and a softening agent; the dispersing agent comprises hydrogenated nitrile rubber, and the softening agent comprises a compound containing a linear chain segment. The positive pole piece in the lithium ion battery has relatively good flexibility and is not easy to crack, and meanwhile, the resistance of the diaphragm is low.