| http://www.w3.org/ns/prov#value | - Other types of polymer solid electrolytes are known, which are similar to the above-mentioned composite materials consisting of PEO and alkali metal salts, but containing an acrylic or methacrylic, organic high polymer having a PEO structure at its side chain, as shown by the following formula (6): ##STR2## wherein m and n each are a desired integer.
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