METHOD FOR REDUCING SELF DISCHARGE IN AN ELECTROCHEMICAL CELL

摘要

A method for reducing the self discharge rate and the variability in the self discharge rate of an electrochemical cell.wherein a porous separator is inserted between a cathode and an anode of the cell and the porous separator contains a nanoweb that comprises a plurality of nanofibers that may contain a fully aromatic polyimide and the fully aromatic polyimide has a degree of imidization of greater than 0.51 where degree of imidization is the ratio of the height of the imide C-N absorbance at 1375 cm-1 to the C-H absorbance at 1500 cm-1.