Negative electrode, preparation method thereof and dual-ion battery

The invention belongs to the field of batteries, and particularly relates to a negative electrode, a preparation method thereof and a dual-ion battery. And the negative electrode comprises the following components in parts by mass: 7-9 parts of a nitrogen-containing porous carbon material, 0.5-2 parts of a negative electrode conductive agent and 0.5-1 part of a negative electrode binder. According to the lithium-based dual-ion battery prepared in the scheme, nitrogen-containing porous carbon is selected as an active material to prepare a current collector-free negative electrode, and an expanded graphite positive electrode is matched, so that the gram volume and the reaction kinetics performance of the negative electrode of the dual-ion battery are effectively improved, and the problem of negative electrode expansion caused by long-term circulation is relieved; the cycling stability, the multiplying power and the low-temperature performance of the battery are improved, and the selection range of the electroly