| abstract |
The invention provides a lithium ion battery and an electrical device including the same, and relates to the field of batteries. The lithium ion battery includes: an electrode assembly; and an electrolyte for infiltrating the electrode assembly; wherein, the electrode assembly includes an electrode body, a positive electrode tab and a negative electrode tab, and the electrode body includes an axis wound together around an axis A positive pole piece, a negative pole piece and a separator arranged between the positive pole piece and the negative pole piece; the positive pole tab is connected to the positive pole piece, and the negative pole tab is connected to the Negative pole piece; along the axis direction (X), the electrode body has oppositely arranged two sides, the positive electrode tab and the negative electrode tab respectively extend from the two sides of the electrode body; the positive electrode The pole piece includes a positive electrode current collector and a positive electrode material layer disposed on at least one surface of the positive electrode current collector, the electrolyte solution contains additive A, and the diffusion rate v of the electrolyte solution in the electrode body is 0.01 μg/s～ 5μg/s. The lithium-ion battery has the advantages of high energy density, high cycle performance and high safety. |