The invention relates to a preparation method of a power and
energy storage lithium-
ion battery. A negative active substance of the power and
energy storage lithium-
ion battery comprises soft carbon, hard carbon, a mixed material of soft carbon and
graphite and a mixed material of hard carbon and
graphite. The designing method of the battery comprises the steps of designing the
gram volume of the negative active substance as the primary
lithium-embedding
gram volume, designing the
gram volume of the positive active substance as the primary lithium-removal gram volume, designing the ratio of the capacity of the positive
electrode and the capacity of the negative
electrode to be (1: 1) to (1.5: 1). By adopting the designing method, the capacity and comprehensive performance of the battery can be remarkably improved, and excellent lithium-embedding and lithium-removal capacity of the soft carbon material and the hard carbon material can be adequately exerted. Compared with the existing
lithium battery technology, the prepared power
lithium battery has long service life, high multiplying power, high safety performance and excellent low-temperature performance and can be widely applied to the fields such as electric tools, various portable devices,
spaceflight, starting power supply and the like.