BATTERY SEPARATOR AND BATTERY
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United States of America Patent
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app pub date -
Dec 12, 2012
filing date -
Mar 7, 2011
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Abstract
Provided are a battery separator with which a battery with improved safety can be formed, and a battery including the separator. The battery separator of the present invention includes a multilayer porous film including at least a resin porous film (I) and a heat-resistant porous layer (II) predominantly composed of heat-resistant fine particles. The battery separator shuts down at a temperature of 100 to 150° C. and at a speed of 50 Ω/min·cm2 or higher. The battery of the present invention includes a positive electrode having an active material capable of intercalating and deintercalating Li ions, a negative electrode having an active material capable of intercalating and deintercalating Li ions, an organic electrolyte and the battery separator of the present invention.
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