Patent ID: 8628885

Claim:
A secondary battery comprising: a cathode containing a cathode active material capable of inserting and extracting an electrode reactant; an anode containing an anode active material capable of inserting and extracting the electrode reactant; and an electrolyte containing a solvent and an electrolyte salt, wherein at least one of the cathode, the anode, and the electrolyte contains a compound shown in Formula (1) or a nitrile compound shown in Formula (2): where x is a group with (a+b) valency having a radical scavenger function, and M is a metal element; where a and b are an integer equal to or more than 0; where c, d, and e are an integer equal to or more than 1; and where (a+b)≧1 is satisfied; where R1 is a group with (a1+b1+c1) valency composed of an element selected from the group consisting of hydrogen (H), oxygen (O), and halogen elements and carbon (C); where M1 is a metal element; where a1, d1, f1, and e1 are an integer equal to or more than 1; where b1 and c1 are an integer equal to or more than 0; and where (b1+c1)≧1 is satisfied; wherein the compound shown in the Formula (1) is the compound shown in the Formula (1-1) or the compound shown in the Formula (1-2), and the nitrile compound shown in the Formula (2) is the compound shown in the Formula (2-1) or the compound shown in the Formula (2-2):