Secondary battery with organic electrolytic solution
View Patent ↗Disclosed herein is a highly reliable secondary battery with organic electrolytic solution. The secondary battery has a set of plates for the positive and negative electrodes, with a separator interposed between them, and an organic electrolytic solution composed of an organic solvent and an electrolyte dissolved therein. The organic electrolytic solution contains polyethylene glycol and bis-(3-Sulfopropyl)disulfide.
1. A secondary battery with organic electrolytic solution, the secondary battery including a set of plates for a positive electrode and negative electrode, with a separator interposed between them, and an organic electrolytic solution composed of an organic solvent and an electrolyte dissolved therein,
wherein the organic electrolytic solution contains polyethylene glycol and bis-(3-Sulfopropyl)disulfide.
2. The secondary battery with organic electrolytic solution as defined in claim 1 , wherein
the polyethylene glycol is contained in an amount of 0.001 to 0.01 wt % for a total amount (by weight) of the organic solvent, and
the bis-(3-Sulfopropyl)disulfide is contained in an amount of 0.5 to 2 wt % for the total amount (by weight) of the polyethylene glycol.
3. The secondary battery with organic electrolytic solution as defined in claim 1 , wherein the separator is a laminate separator of multiple layer structure.
4. The secondary battery with organic electrolytic solution as defined in claim 3 , wherein the separator is composed of a plurality of microporous membrane of polyolefin resin.
5. The secondary battery with organic electrolytic solution as defined in claim 4 , wherein the laminate separator is constructed such that adjacent layers differ from each other in at least either of pore diameter and pore volume.