An electrolyte solution for a lithium ion secondary battery, containing a compound (1) represented by the following formula (1):
wherein R
1
and R
2
are each independently a C1-C4 alkyl group optionally containing an ether bond, and wherein chloride ion is present at a concentration of 1.0×10
−6
to 1.0×10
3
ppm. Also disclosed is an electrolyte solution for a lithium ion secondary battery, containing an imidazolium cation (1-1) represented by the following formula (1-1), a bis(oxalato)borate anion, and a hexafluorophosphate anion, the formula (1-1) being:
wherein R
1
and R
2
are each independently a C1-C4 alkyl group optionally containing an ether bond, and wherein chloride ion is present at a concentration of 1.0×10
−6
to 1.0×10
3
ppm.
一种用于
锂离子二次电池的电解质溶液,包含一种由以下
化学式(1)表示的化合物(1):其中R1和R2分别独立地是含有醚键的C1-C4烷基基团,并且
氯化物离子的浓度为1.0×10-6至1.0×103ppm。还公开了一种用于
锂离子二次电池的电解质溶液,包含由以下
化学式(1-1)表示的
咪唑阳离子(1-1),一种双(
草酸盐)
硼酸根离子和一种
六氟磷酸根离子,其中
化学式(1-1)为:其中R1和R2分别独立地是含有醚键的C1-C4烷基基团,并且
氯化物离子的浓度为1.0×10-6至1.0×103ppm。