The invention relates to the technical field of
lithium batteries, in particular to a method for evaluating the gas production performance of a
lithium-rich
manganese-based positive
electrode material and application of the method. The evaluation method comprises the following steps: preparing the
lithium-rich
manganese-based positive
electrode material into a lithium-rich positive
electrode plate with the surface density of A, the
porosity of B and the
radius of D; dropwise adding an
electrolyte with the volume of C onto the lithium-rich positive
pole piece and the diaphragm, and assembling into a button type
half cell; 10 < = pi * D2 * A * 100B / C < = 25; the cycle index of the button type half-
cell before diving has a corresponding relationship with the gas
production rate of the lithium-rich
manganese-based positive
electrode material, and the gas production performance of the lithium-rich manganese-based positive
electrode material is evaluated through the corresponding relationship between the cycle index of the button type half-
cell before diving and the gas
production rate of the lithium-rich material. According to the method, the surface and interface stability of the lithium-rich manganese-based positive
electrode material containing the
coating layer or not containing the
coating layer can be rapidly evaluated, and the gas production performance of the lithium-rich manganese-based positive electrode material can be rapidly evaluated.