| abstract |
A method for predicting the life characteristics of a secondary battery equipped with a carbon-based hybrid negative electrode, wherein the method is for charging a target secondary battery including a target carbon-based hybrid negative electrode including a carbon-based negative electrode active material and a non-carbon-based negative electrode active material. During the discharge, the lattice spacing of the carbon-based negative electrode active material of the target carbon-based hybrid negative electrode is measured using an X-ray diffractometer, and the change in the lattice spacing value with respect to the charge / discharge capacity (X-axis) is plotted on a graph. Refer to the step of calculating the target gradient difference, which is the difference between the gradient values changed with the turning point of the graph as the boundary during discharge, and the target gradient difference from the plotted graph. In the graph showing the change in the grid spacing value with respect to the charge / discharge capacity (X-axis) of Disclosed is a method for predicting the life characteristic of a secondary battery, which comprises a step of predicting whether or not the life characteristic of the target secondary battery can be improved with respect to the secondary battery. |