A new type of solid polymer electrolyte (SPE) was prepared by sequential in
terpenetration of cross-linked methoxyoligo (oxyethylene) methacrylate (MOE
nM) and poly(methyl methacrylate) (PMMA). When the interpenetrating polymer
networks (IPNs) were swollen with liquid electrolyte solutions, they showe
d structures that were between the chemically cross-linked gel SPEs and the
porous SPE. They could swell/hold much more electrolyte solution than the
porous SPE. The electrolytes exhibited ionic conductivities in the order of
10(-3) S cm(-1) at 25 degreesC, and could be useful in many practical elec
trochemical devices. (C) 2001 Elsevier Science Ltd. All rights reserved.