| 摘要 |
PURPOSE:To avoid cracking by dispersing crack control members in an electrolyte retaining layer. CONSTITUTION:An electrolyte retaining layer 5 is one wherein each crack control member, in this case, a large size sintered porous body 5b which is stable against an electrolyte, furnished with through holes, high in mechanical strength, and is equal to or more than several ten mum in size, is dispersed into an unsintered porous layer 5a mainly composed of ceramic particles, each of which is stable against the electrolyte retained by electrolytic solution while being 0.1 to 10mum in size. Said electrolyte retaining layer 5 forces the large size sintered porous body high in mechanical strength to control the propagation of cracks even when the layer is subjected to thermal stresses. In addition, the large size sintered porous body makes ions pass through, thereby making ions excellent in conductivity so that cell characteristics can favorably be improved. |
