| abstract |
【Task】 The present teachings are electrochemical comprising an anode, a cathode, an electrolyte, a separator disposed between the cathode and the anode, and a housing holding the anode, cathode, electrolyte and separator. Contains cells. The separator plate can include a first sheet substantially consisting of a single layer material and a second sheet that is different from the first sheet. The second sheet can include a microporous inner layer laminated between two additional outer layers. In some cells, the inner layer can have a transition temperature in the range of about 80 ° C. to 150 ° C. between the porous and substantially non-polymorphic forms, and the two additional outer layers can be Maintains its structural integrity to a temperature at least about 10 ° C. above the transition temperature of one layer. |