| 摘要 |
PURPOSE:To aim at enhancement of cyclic service life of the battery in the caption by adding a specific unsaturated hetero cyclic compound in electrolytic liquid, in a secondary battery in which acetylene high polymer and transition metal chalcognide are used in a negative plate and a positive plate respectively. CONSTITUTION:Electrolytic liquid contains an organic solvent, a supporting electrolyte and at least one kind of unsaturated hetero cyclic compounds expressed by formulae I-V (where R<1>-R<5> stand for alkyl radical of carbon number one to five each of n1-n5 takes a value, 0, 1, or 2, R stands for a hydrogen atom, alkyl radical of carbon number 1 to 5 or aryl radical of carbon number 6-8). The concentration of unsaturated heterocyclic compound added in electrolytic liquid is preferably 0.01-2vol% and particularly preferable to be 0.1-1vol%. |
