| abstract |
An element having a dense electrolyte layer with high gas barrier performance is realized. A metal-supported electrochemical element E includes a metal substrate 1 as a support, an electrode layer 2 formed on the metal substrate 1, a buffer layer 3 formed on the electrode layer 2, At least an electrolyte layer 4 formed on the buffer layer 3, the electrode layer 2 is porous, the electrolyte layer 4 is dense, and the density of the buffer layer 3 is higher than the density of the electrode layer 2. It is large and smaller than the density of the electrolyte layer 4. [Selection] Figure 1 |