| 摘要 |
PROBLEM TO BE SOLVED: To provide cold molten salt which is more stable on a potential of lithium on a reduction side than on a potential of a lithium on an oxidation side (-3.2V vs. I/I3 ), preferable as electrolyte for lithium secondary battery, and has satisfactory reduction-resistive property. SOLUTION: A cation component is a class for a ammonium which is expressed by NR<1> R<2> R<3> R<4> (where, R<1> , R<2> , and R<3> are the same or different and indicate low-class alkyl group, aryl group, heterocyclic ring group, or aralkyl group, or R<1> and R<2> forms cyclo group, and R<4> indicates low-class alkyl group). The anion component comprises a component selected from a group, in which the anion component contains N (CF3 SO2 )2 -, CF3 SO3 -, BF4 -, Al3 Cl8 -, Al2 Cl7 -, AlCl4 -, and PF6 -and exists stably in a potential region of -3.4 V to 2.4 V. |
