| 摘要 |
In a conventional lithium cell in which lithium ions are inserted/desorbed to/from an active material, charge and discharge cycles are deteriorated by the volume expansion and destruction of the crystal structure of the active material. Provided is a lithium cell which has excellent safety and reliability and is extremely useful as a consumer secondary cell, wherein the charge and discharge cycles can be prevented from being deteriorated, and the electrical capacitance of a positive electrode is remarkably enhanced, using a reaction that metal provided on the surfaces of a negative electrode and a positive electrode is dissolved/precipitated when a cell is charged/discharged. Further, in the lithium cell, the occurrence of metal lithium dendrites can be suppressed, and the life of the charge and discharge cycles is enhanced. Provided is a lithium secondary cell wherein a negative electrode, an electrolytic solution for the negative electrode, a separator, an electrolytic solution for a positive electrode, and a positive electrode are provided in this order, and the separator contains a solid electrolyte which allows only lithium ions to pass therethrough. The solid electrolyte is at least one selected from Li3N, a Garnet-type lithium ion conductor, a NASICON-type lithium ion conductor, a Fe2(SO4)-type lithium ion conductor, a perovskite-type lithium ion conductor, a thio-LISICON-type lithium ion conductor, and a polymer-type lithium ion conductor. |
