
358 HIGH PERFORMANCE POLYMERS
cellular telephones [114]. Lithium batteries based on
liquid electrolytes technology have some drawbacks.
The liquid electrolyte generally requires hermetic
sealing, which may reduce the energy density. In
addition, for safety reasons, lithium ion rechargeable
batteries and lithium-metal primary batteries having
liquid electrolytes are designed to vent automatically
when certain abuse conditions exist, such as a sub-
stantial increase in internal pressure which can be
caused by internal or external overheating. If the cell
is not vented under extreme pressure, it can explode
because the liquid electrolyte used in liquid Li ...