Provided are a rapid preparation method for few-layer MXenes and application, in the method, the preparation of the few-layer MXenes material obtains a few-layer MXenes solution with good dispersibility by stripping multi-layer MXenes liquid phase; the electrostatic balance of the few-layer MXenes solution with is destroyed by introducing the electrolyte solution, the obtained sol, precipitate or filter cake is the few-layer MXenes material by means of cation-assisted electrostatic precipitation process (such as NH 4+) through standing or low-speed centrifugation or pumping filtration; then macro-scale preparation of the few-layer MXenes powder can be realized through freeze drying and subsequent annealing treatment. The prepared few-layer MXenes are suitable for lithium ion batteries or sodium ion batteries.
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