The invention provides a preparation method and application of three-dimensional dendritic
crystal porous silicon, and belongs to the field of
porous silicon preparation. The preparation method has the technical scheme that the preparation method comprises the following steps of Step 1, preparing a precursor
alloy; Step 2, putting the precursor
alloy, with the thickness being 5 mum to 500 mum, obtained in the Step 1 into
corrosion liquid to be subjected to dealloying treatment for obtaining a dealloyed specimen; and Step 3, performing subsequent treatment to obtain a three-dimensional
micrometer / nanometer dendritic
crystal structure
porous silicon material. The preparation method and the application of the three-dimensional dendritic
crystal porous
silicon have the beneficial effects thatcasting aluminum-
silicon alloys commonly used in production are used as raw materials, so that the production cost is greatly reduced; meanwhile, the difficult problem that for
powder materials, precursor
alloy metallographic structures are difficult to control and to further regulate and control for finally preparing the structure and morphology of the porous
silicon material can be solved; theprecursor alloy structure regulation and control and the experiment conditions are easy to control, so that the problem of industrialization
bottleneck of low-cost
energy storage can be solved; and good commercial prospects are realized.