| abstract |
[PROBLEMS] To be excellent in performance as a separator for electrochemical elements such as low internal resistance, to have a high lithium barrier property that cannot be exhibited by nonwoven fabric, paper, etc. A cellulose microporous membrane having a high density is provided. A heat-resistant cellulose microporous membrane comprising cellulose fibers and a polymer binder, wherein at least the polymer binder is crosslinked. [Selection figure] None |