Polymer solid electrolyte, method for manufacturing polymer solid electrolyte, and lithium secondary cell adopting polymer solid electrolyte

A polymer solid electrolyte comprising:

• a polymer electrolyte medium;
• at least one vinylidene fluoride resin and/or at least one N,N-diethylacrylamide,
• wherein the polymer electrolyte medium has a polymer matrix comprised of:
• a copolymer of a polymerizable monomer expressed by the formula (1) and a cross-linking agent expressed by the formula (2);
• a polymerization initiator;
• and
• an electrolyte solution containing an inorganic salt and a solvent ##STR4## where R.sub.1 is hydrogen or methyl group, and R.sub.2 and R.sub.3 are each independently one selected from the group consisting of hydrogen, methyl, ethyl, propyl, dialkylaminopropyl (--C.sub.3 H.sub.6 N(R').sub.2) and hydroxyethyl (CH.sub.2 CH.sub.2 OH) groups, and R.sub.4 and R.sub.5 are each independently hydrogen or methyl group, and n is an integer from 3 to 30, wherein R' is C.sub.1 .about.C.sub.5 alkyl group.