| 摘要 |
The present invention relates to a sodium all-solid-state secondary cell of low-temperature operating type. Because sodium all-solid-state secondary cells of low-temperature operating type represent very new technology, the selection of the positive electrode active material necessary for actual assembly in a cell remains a matter of research. Through the present invention, it is possible to provide a high-capacity, sodium all-solid-state secondary cell of low-temperature operating type, wherein, in the all-solid-state secondary cell of low-temperature operating type, the positive electrode includes a positive electrode active material comprising Na2Sx (x = 1-8), and the solid electrolyte layer is constituted to include an ion-conductive glass ceramic shown by the general formula Na2S-MxSy (where M is selected from P, Si, Ge, B, and Al; x and y are integers that provide stoichiometric proportions according to the species of M; and Na2S ranges from greater than 67 mol% to less than 80 mol%), so the cell is not dependent upon lithium resources. |
