Separator And Lithium-Ion Secondary Battery

摘要

The present disclosure provides a separator and a lithium-ion secondary battery. The separator comprises: a microporous membrane having micropores; and a coating provided on a surface of the microporous membrane. The coating comprises polymer particles and binder particles. The polymer particle is a hollow shell structure which comprises a shell and a cavity positioned in the shell, an outer surface of the shell is distributed with nanopores which are communicated with the cavity, a particle diameter of the polymer particle is larger than a pore size of the micropore of the microporous membrane; a particle diameter of the binder particle is larger than the pore size of the micropore of the microporous membrane. The lithium-ion secondary battery comprises: a positive electrode plate; a negative electrode plate; the aforementioned separator interposed between the positive electrode plate and the negative electrode plate; and an electrolyte.

主权项

1. A separator, comprising:
a microporous membrane having micropores; and a coating provided on a surface of the microporous membrane and comprising: polymer particles, the polymer particle being a hollow shell structure and comprising a shell and a cavity positioned in the shell, an outer surface of the shell being distributed with nanopores which are communicated with the cavity, a particle diameter of the polymer particle being larger than a pore size of the micropore of the microporous membrane; and binder particles, a particle diameter of the binder particle being larger than the pore size of the micropore of the microporous membrane.