Ion conducting polymer electrolyte and secondary battery using the same

Disclosed is an ion conducting polymer electrolyte for electrical devices which has low volatility, excellent formability and workability, high compression strength and good ion conductivity over a wide temperature range from normal temperature to high temperature, while exhibiting good chemical stability under high temperature conditions. Also disclosed is a secondary battery using such an ion conducting polymer electrolyte, which has a practically sufficient output over a wider temperature range, while exhibiting good safety and reliability under high temperature conditions. Specifically disclosed are an ion conducting polymer electrolytefor electrochemical devices and a secondary battery using the ion conducting polymer electrolyte, which comprise a polymerizable boron-containing compound represented by the formula (1) below, a polymer compound represented by the formula (2) below and an electrolyte salt. In the formula (1), B represents a boron atom; Z, Z and Z independently represent a polymerizable func