| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode excellent in the cycle characteristic, preservation stability, wettability with an electrolyte, and strength by connecting a negative electrode active material containing tin oxide fibers in a carbon material capable of storing/discharging lithium to a current collector. SOLUTION: A positive electrode, a negative electrode, and a reference electrode are suspended from an upper lid in a glass cylinder container, LiPF6 is dissolved in an equivolume mixed solvent of ethylene carbonate and diethylene carbonate for use as a nonaqueous electrolyte. LiCoO2 serving as a positive electrode active material, acetylene black, and a binder are kneaded at the ratio of 90:5:5wt.% to form a slurry, and this slurry is applied on a current collector of a copper foil and dried to obtain the positive electrode. Tin oxide fibers and the binder are kneaded into graphite powder serving as a negative electrode powder to form a slurry, and this slurry is applied to a current collector of the copper foil and dried to obtain a negative electrode. A lithium metal is used for the reference electrode, and a polypropylene fine porous film is arranged to surround the negative electrode as a separator. |
