Preparing Polypyrrole-Based Membrane by In-Situ Polymerization on Electrospun Nanofibers

From Chap. 3 , an important conclusion is that the use of a thin separator with high porosity of 80% in a LIB cell can achieve enhanced battery energy density with low internal mass transfer resistance. The high porosity of a separator can be achieved by developing electrospun nanofibrous separator, due to the electrospun membrane can attain porosity as high as above 70%. However, the thickness of a separator in actual battery applications cannot be reduced to extremely thin. Because, there is a trade-off between a separator’s thickness and its mechanical strength. A separator has to be sufficiently strong to fulfill the mechanical requirements of the battery assembling process, and maintain its integrity during battery operations.