Analytical balance FA1004

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Battery Separator Testing - Porosity Porosity is an important parameter affecting the electrochemical performance of the separator. In theory, other parameters such as air permeability, liquid absorption rate, electrochemical impedance, etc. are all related to this. Porosity is defined as the ratio of the volume of micropores in the diaphragm to the total volume of the diaphragm. Currently, the porosity controlled by diaphragm manufacturers is Most of them are 25%-85%. The micropores in the diaphragm are generally divided into three types: through holes, blind holes and closed holes. At present, the test method of diaphragm porosity is important There are liquid absorption method, calculation method and instrument test method.