▎ 摘　　要

NOVELTY - Prediction of life characteristics of secondary battery involves charging and discharging of a target secondary battery containing a target carbon-based hybrid negative electrode containing a carbon-based negative active material and a non-carbon-based negative active material when measuring a lattice spacing of the carbon-based negative active material of the target carbon-based hybrid negative electrode (d-spacing) using an X-ray diffractometer, plotting a change in a grid spacing value versus a charge/discharge capacity (X-axis) in a graph, calculating a target slope difference, which is a difference between a slope value changed based on an inflection point of the graph while discharge is in progress in the plotted graph, comparing the target slope difference with a reference slope difference. USE - Prediction of life characteristics of secondary battery such as full-cell secondary battery used as power source. Uses include but are not limited to electric vehicle, hybrid electric vehicle, plug-in hybrid electric vehicle, robots, and power storage system. ADVANTAGE - The method enables efficient prediction of life characteristics of secondary battery. DETAILED DESCRIPTION - Prediction of life characteristics of secondary battery involves charging and discharging of a target secondary battery containing a target carbon-based hybrid negative electrode containing a carbon-based negative active material and a non-carbon-based negative active material when measuring a lattice spacing of the carbon-based negative active material of the target carbon-based hybrid negative electrode (d-spacing) using an X-ray diffractometer, plotting a change in a grid spacing value versus a charge/discharge capacity (X-axis) in a graph, calculating a target slope difference, which is a difference between a slope value changed based on an inflection point of the graph while discharge is in progress in the plotted graph, comparing the target slope difference with a reference slope difference, which is a difference between a slope value changed as a boundary, with an inflection point in a graph showing a change in a grid spacing value compared to a charge/discharge capacity (X-axis) of a reference secondary battery, and predicting whether or not the lifespan characteristics of the target secondary battery are improved compared to the reference secondary battery from the comparison result.