| abstract |
The invention belongs to the technical field of lithium ion battery preparation, and in particular relates to a lithium ion battery. The lithium ion battery includes a positive electrode plate and an electrolyte, the positive electrode plate includes a positive electrode current collector and an active material layer arranged on the positive electrode current collector, the density of the electrolyte solution, the concentration of lithium salt in the electrolyte solution and The areal density of the active material layer disposed on the positive electrode current collector satisfies a specific relationship, and on the basis of ensuring the performance of the lithium ion battery, the concentration of the lithium salt in the electrolyte is reduced, and the cost of the battery cell is effectively reduced; at the same time, the lithium salt The reduction of the concentration makes the viscosity of the electrolyte smaller, improves the wettability of the electrolyte, and is beneficial to the cell size under the same injection volume, the electrolyte injection quality that satisfies this relationship is low, and the cost of the battery is reduced. |