| 摘要 |
PURPOSE:To improve the charge-and-discharge cycle characteristic of a nonacqueous electrolyte secondary battery having manganese dioxide as an active material by making a solvent to be 1,3-dioxane or a mixed solvent containing 1,3-dioxane. CONSTITUTION:1,3-dioxane or a mixed solvent containing 1,3-dioxane is used as the solvent constituting a nonaqueous electrolyte. When assembling a battery by using a nonaqueous electrolyte having 1,3-dioxiane as the solvent, some of 1,3-dioxiane is reduced on a negative electrode surface to form a protective film and decomposition and polymerization are hardly caused since dissolution and precipitation of an active material of a lithium negative electrode are generated through the protective film, growth of lithium dendrite is suppressed, while an anti-oxidation property is excellent. Therefore, a cycle characteristic of change and discharge can be enhanced. |
