Obviousness

The provided patent text for US patent 11575148 includes a "Prior art keywords" section listing "porous film, lithium, inorganic particles, ion battery, range" and a "Prior art date" of 2018-04-11. However, this section does not list any specific prior art references (such as patent numbers, journal articles, or publications) that would be required to perform an obviousness analysis under 35 U.S.C. § 103.

To analyze obviousness, it is necessary to identify specific prior art documents that disclose elements of the claimed invention. Without such explicit references, it is not possible to identify combinations of prior art references or to explain the motivation for a person having ordinary skill in the art (PHOSITA) to combine them.

Therefore, I cannot fulfill the request to identify combinations of prior art references that would render the claims of US 11575148 obvious based solely on the "Prior Art section of this page" as provided.