Three-dimensional porous material, negative electrode composite material, and application

A negative electrode composite material, wherein the negative electrode composite material comprises a three-dimensional porous material and a plurality of nanoparticles located in a hole, wherein the three-dimensional porous material comprises a plurality of holes, a total hole volume of the three-dimensional porous material is used as a reference, a volume proportion of a hole having an opening diameter that is less than or equal to 2 nm is greater than or equal to 70%, and a volume proportion of a hole having an opening diameter that ranges from 1 nm to 2 nm is greater than or equal to 50%;

• and
• a material of the nanoparticle comprises at least one of a silicon-containing material, a phosphorus-containing material, or a tin-containing material.

A secondary battery, wherein the secondary battery comprises a negative electrode plate, a positive electrode plate, and an electrolyte located between the negative electrode plate and the positive electrode plate;

• wherein the negative plate comprising a current collector and a negative electrode material layer disposed on a surface of the current collector, wherein the negative electrode material layer comprises a negative electrode composite material, wherein the negative electrode composite material comprises a three-dimensional porous material and a plurality of nanoparticles located in a hole, wherein the three-dimensional porous material comprises a plurality of holes, a total hole volume of the three-dimensional porous material is used as a reference, a volume proportion of a hole having an opening diameter that is less than or equal to 2 nm is greater than or equal to 70%, and a volume proportion of a hole having an opening diameter that ranges from 1 nm to 2 nm is greater than or equal to 50%;
• and
• a material of the nanoparticle comprises at least one of a silicon-containing material, a phosphorus-containing material, or a tin-containing material.