| 摘要 |
PURPOSE:To provide a lithium ion battery which is free from violent spout of the electrolyte decomposition gas out of a battery vessel accompanied with particulates of the active material even in case it is, in charged state, placed on a hot plate or the like which is heated to 250 deg.C approximately. CONSTITUTION:A separator concerned consists of aramid fiber as polymeride of all-aromatic polyamide and shaped in a paper-like sheet having air permeability, wherein the structure is such that synthetic pulp as polymeride of all- aromatic polyamide is dispersed in non-woven or woven fabric of aramid fibers or in voids therein. Otherwise, the separator may be a draughty film with a number of pores opened which consists of aramid resin as polymeride of all- aromatic polyamide. |
