Preparation method of three-dimensional fluorinated carbon fiber flexible electrode

The invention discloses a preparation method of a three-dimensional fluorinated carbon fiber flexible electrode in the technical field of battery electrode preparation, and the preparation method comprises the following steps: 1, adding a metal salt into absolute ethyl alcohol, and stirring for 30 minutes to obtain an ethanol solution in which metal ions are dissolved; 2, soaking carbon fiber cloth in the prepared ethanol solution for 10 minutes, transferring the soaked carbon fiber cloth into a sealed plastic box filled with argon, and applying pulse voltage to obtain three-dimensional carbon fiber cloth on which carbon nanotubes grow on carbon fibers in a high-density manner; and 3, placing the three-dimensional carbon fiber prepared in the step 2 in a reaction container, introducing nitrogen into the reactor to enable the internal pressure to reach 0.3 MPa, maintaining the pressure for 12 hours, controlling the temperature of the reactor at 600 DEG C, continuously introducing reaction gas into the reactor