| 摘要 |
PURPOSE: A borate salt, its preparation method, an electrolyte containing the borate salt, an electrochemical cell containing the electrolyte and a super condenser according to the electrochemical cell are provided to improve the electrochemical stability and the conductivity of an electrochemical cell. CONSTITUTION: The borate salt is represented by the formula M¬n+£BFx(CyF(2y+1-z)Hz)(4-x)|n ¬-, wherein 1<x<3; 1<=y<=8; 0<=z<=2y+1; and M is a monovalent, divalent or trivalent cation (1<=n<=3), is not K or Ba, and particularly is Li, NR1R2R3R4, PR5R6,R7R8, P(NR5R6)kR7mR8(4-k-m), C(NR5R6)(NR7R8)(NR9R10) or an aromatic heterocyclic cation(wherein k is 1-4, m is 0-3, k+m is 4 or less, R1 to R4 are CyF(2y+1-z)Hz, and R5 to R10 are H or CyF(2y+1-z)Hz). Preferably M is a N- and/or O- and/or S-containing aromatic heterocyclic cation.
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