| 摘要 |
PURPOSE:To increase the liquid absorbing property and the liquid holding property of a separator so as to reduce a liquid leaking in the sealing time, and to improve the cycle property, by using a polyolefin system nonwoven fabric to which a hydrophiric group is led in as a separator. CONSTITUTION:A polyolefin system nonwoven fabric in which a sulfonic group, a calboxyl group, and a hydrophiric group selected from a group of oxids of polyolefin system resin are led in is used as a separator 3, while a composition of the composite which consists mainly of a LiMn complex oxide or the like is used as the positive electrode 2. A Li-Al alloy or the like is used as the negative electrode 1, an organic electrolyte using an organic solvent with a polarity is used as the electrolyte, and a negative electrode can 4 and a positive electrode can 5 made of a stainless steel, and a ring-form gasket 6 made of polypropylene are used to form a coin-form lithium secondary battery. By a static electricity between the separator 3 and the electrolyte, the liquid holding property is improved, a liquid leakage in the sealing time is prevented, and a deterioration of the cycle property can be prevented. |
