Importance

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Abstract

Objects of the invention are to provide an ion-conductive polymer electrolyte for electrochemical device which has low volatility, is excellent in moldability and processability, has high compressive strength, has satisfactory ionic conductivity in a wide temperature range from ordinary to high temperatures, and has satisfactory chemical stability in high-temperature environments and to provide a secondary battery which employs the electrolyte and which has a practically sufficient output in a wide temperature range and has satisfactory safety and reliability in high-temperature environments.The polymer electrolyte for electrochemical device of the invention and the secondary battery employing the electrolyte include a polymer of a polymerizable boron-containing compound represented by formula (1), a high-molecular compound represented by formula (2), and an electrolyte salt.O each independently represent an oxyalkylene group having 2-6 carbon atoms; and h, i, and j, which each indicate the average number of moles of the oxyalkylene group added, each independently are 1-10.  (2)O may be the same or different.

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First Claim