| abstract |
(57) [Problem] To provide an actinic ray-polymerizable composition having good polymerizability. Providing high solid polymer electrolyte with high ionic conductivity and good stability. Provide primary and secondary batteries that can be easily thinned, can operate with high capacity and high current, have a long service life, and are highly reliable. Provide an electric double layer capacitor with high output voltage, large take-out current, good workability, long life and excellent reliability. SOLUTION: At least one kind of actinic ray polymerizable compound having a polymerizable functional group which becomes a polymer having a crosslinked and / or side chain structure by polymerization, at least one kind of electrolyte, and at least one kind of polymerization initiator are provided. X-C as a polymerization initiator in an actinic ray-polymerizable composition containing OY [wherein X is an aryl group which may have a substituent, Y Represents a phosphinoyl group having a substituent. An actinic ray-polymerizable composition comprising an actinic ray polymerization initiator having a structure represented by the following formula: A solid polymer electrolyte obtained from the composition, and a battery and an electric double layer capacitor using the same. |