| 摘要 |
PURPOSE:To obtain a nonaqueous electrolyte battery excellent in its low temperature discharge characteristic and storage characteristic, by using a mixed solvent including at least dioxolan and pyrrolidone. CONSTITUTION:N-methyl-Z-pyrrolidone or the like as pyrrolidne is used to capture cation of dioxolan produced during storage, suppress chain reaction, and inhibit the polymerization of dioxolan. By this process, degradation of electrolytic liquid is prevented. For example, an electrolyteic liquid is obtained by resolving 1mol/1 of lithium perchlorate into a mixed solvent of dioxolan and N-methyl-Z-pyrrolidone with a volume ratio of 1:0.001, and a positive electrode is made by mixing MnO2 from which water is removed, carbon powder, and fluororesin powder with a weight ratio of 85:10:5, and forming the mixture by pressure followed by heat processing. a negative electrode is made by a plate punched out from a rolled Li plate, and the flat nonaqueous electrolyte battery having good characteristics is obtained with nonwoven fabric of polypropylene as a separator. |
