DIAPHRAGM FOR CELL, AND CELL

摘要

The diaphragm for a cell can reliably ensure safety by causing the cell to lose the function when the temperature abnormally rises due to external short-circuit or the like. The cell comprises positive and negative electrodes, and a diaphragm. The diaphragm comprises polymer porous body which is hydrophilized, and polymer grains whose fusion point is 80 to 170 DEG C, and which include grains of ethylene copolymer having side chains. The polymeric grains are carried by the polymerically porous body.