Provided herein are a porous film, a separator including the same, an electrochemical device including the separator, and a method of preparing the porous film. The porous film includes first cellulose nanofibers which is impregnated with a carbonate-based solvent-containing electrolyte solution and has a reaction heat of 150 J/g or less at a temperature ranging from about 30° C. to about 300° C., as measured by differential scanning calorimetry (DSC).
本文提供了一种多孔薄膜、一种包括多孔薄膜的分离器、一种包括分离器的电
化学装置以及一种制备多孔薄膜的方法。多孔薄膜包括第一
纤维素纳米纤维,该
纤维素纳米纤维浸渍在含
碳酸盐溶剂的电解质溶液中,通过差示扫描量热仪(
DSC)测量,在约 30°C 至约 300°C 的温度范围内,反应热为 150 焦耳/克或更低。