| 摘要 |
PURPOSE: To provide a lithium secondary battery with excellent high voltage resistance and high negative electrode charging characteristics by using diethyl malonate as an electrolyte. CONSTITUTION: A lithium secondary battery comprises a stainless steel negative case 1, a negative electrode 2, an electrolyte 3 using a nonaqueous solvent, a separator 4, a positive electrode 5, a stainless steel positive case 6, and a gasket 7. As the positive electrode 5, a composite oxide of a composite oxide of Li and Co, or Li and Ni with Li and a transition metal can be used. As the negative electrode, a material capable of charging/discharging a lithium ion, such as lithium metal, a lithium alloy, and others is used. As an electrolyte of the electrolyte solution, LiClO4 , LiPF6 , LiAsF6 , LiBrF4 , or LiAlCl4 alone or a mixture of these compounds is used. By using diethyl malonate as the solvent of a nonaqueous solvent electrolyte, the secondary battery with long life and high energy density is obtained. For example, the electrolyte prepared by dissolving one molar LiClO4 in diethyl malonate is used. |
