Electrolyte-electrode joined assembly and method for producing the same

A method for producing an electrolyte-electrode joined assembly comprising a solid electrolyte interposed between an anode and a cathode, said method comprising:

• manufacturing constitutive particles of one said anode and said cathode by a spray drying method or a rolling granulation method:
• manufacturing a compact with said constitutive particles by press forming at a press pressure of 25 to 120 MPa such that a porosity of the compact becomes 40% to 70%, and then heating said compact;
• providing said solid electrolyte on one end surface of said compact and then mutually sintering said compact and said solid electrolyte to prepare a sintered product;
• and
• providing other of said anode and said cathode on said solid electrolyte of said sintered product, wherein
• said one of said anode and said cathode prepared with said compact is manufactured as a portion of said sintered product and includes said constitutive particles bonded to one another in an aggregated state and pores which communicates with each other three-dimensionally and of which two-dimensional cross sections are not perfect circles, such that a porosity of the sintered product is 10% to 50% by volume.