| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery electrolyte consisting of a polymer electrolyte that is useful as a material for an electro-chemical device such as secondary battery that does not catch fire or not continually burn, and the safety property of the battery is excellent. SOLUTION: The compound of boric acid ester for the secondary battery electrolyte consists of a compound of boric acid obtained by esterifying a oxyalkylene derivative containing polymeric functional group shown by equation (1). The concentration of boric acid in the compound is 0.07 to 1.00% by weight. The secondary battery electrolyte and the secondary battery containing the ester compound. RO(AO)n H (1) (In the equation, R is acryloyl radical, methacryloyl radical, vinyl radical or allyl radical, AO is oxyalkyrene radical, n is 1 to 110 in the average addition mole number of oxyalkylene radial consisting of carbon atoms 2 to 4. |
