Nonaqueous polymer cell

摘要

A nonaqueous polymer cell according to the present invention contains a lithium ion conductive polymer having a porosity in the range of 10% to 80%. In the cell of the present invention, the electrolyte is held not only in the pores of the microporous polymer but also within the polymer itself. Consequently, lithium ions can move not only through the pores of the microporous polymer film but through the polymer itself. The cell of the present invention, which contains a microporous polymer having interconnected pores, shows greatly improved high-rate charge/discharge characteristics especially when the microporous polymer is used in combination with an electrode comprising an active material which expands and contracts upon charge and discharge, because volume changes of the active material cause flows of the electrolyte through the pores of the microporous polymer and the flows carry lithium ions.