Secondary battery

A secondary battery, comprising an electrode assembly in which a positive electrode and a negative electrode are oppositely disposed, an electrolyte liquid, and a package which encloses the electrode assembly and the electrolyte liquid inside;

• wherein the negative electrode is formed by binding a negative electrode active substance, which comprises a metal (a) that can be alloyed with lithium, a metal oxide (b) that can absorb and desorb lithium ion, and a carbon material (c) that can absorb and desorb lithium ion, to a negative electrode collector with at least one selected from polyimides and polyamide-imides;
• and
• wherein the electrolyte liquid comprises a compound represented by any one of following formulae (1) to (9).
• (R1 represents hydrogen atom, an alkyl group, an aryl group, an amino group, hydroxy group or a halogen atom, wherein the alkyl group or the aryl group may be substituted.)
• (Ra represents hydrogen atom, an alkyl group, an aryl group, an amino group, hydroxy group or a halogen atom, wherein the alkyl group or the aryl group may be substituted.)
• (R2 represents hydrogen atom, an alkyl group, an aryl group, an amino group, hydroxy group or a halogen atom, wherein the alkyl group or the aryl group may be substituted.)
• (R3 represents hydrogen atom, an alkyl group, an aryl group, an amino group, hydroxy group or a halogen atom, wherein the alkyl group or the aryl group may be substituted.)
• (R4 represents hydrogen atom, an alkyl group, an aryl group, an amino group, hydroxy group or a halogen atom, wherein the alkyl group or the aryl group may be substituted.)
• (R5 and R6 each independently represent hydrogen atom, an alkyl group, an aryl group, an amino group, hydroxy group or a halogen atom, wherein the alkyl group or the aryl group may be substituted.)