SOLID OXIDE FUEL CELL AND ELECTROLYSIS DEVICE

摘要

The present invention provides a fuel cell comprising a cathode, an electrolyte membrane, and an anode. The electrolyte membrane is sandwiched between the cathode and the anode. The cathode is formed of a first proton conductor represented by the following chemical formula Aa(BbMm)O3-x (where A represents a divalent metal, B represents a tetravalent metal, M represents a trivalent metal, 2(3−x)=2a+4b+3m, b+m=1, and x=(3−2a−b)/2) and a mixed ionic electronic conductor. The electrolyte membrane is formed of a second proton conductor represented by the following chemical formula A′a′(B′b′M′m′)O3-x′ (where A′ represents a divalent metal, B′ represents a tetravalent metal, M′ represents a trivalent metal, 2(3−x′)=2a′+4b′+3m′, b′+m′=1, and x′=(3−2a′−b′)/2). The following mathematical formula m≦m′ is satisfied. The electric power generation efficiency is improved.

主权项

1. A fuel cell comprising:
a cathode; an electrolyte membrane; and an anode, wherein the electrolyte membrane is sandwiched between the cathode and the anode; the cathode is formed of a first proton conductor represented by the following chemical formula (I) and a mixed ionic electronic conductor:
Aa(BbMm)O3-x  (I) where
A represents a divalent metal,B represents a tetravalent metal,M represents a trivalent metal,2(3−x)=2a+4b+3m,b+m=1, andx=(3−2a−b)/2; the electrolyte membrane is formed of a second proton conductor represented by the following chemical formula (II):
A′a′(B′b′M′m′)O3-x  (II) where
A′ represents a divalent metal,B′ represents a tetravalent metal,M′ represents a trivalent metal,2(3−x′)=2a′+4b′+3m′,b′+m′=1, andx′=(3−2a′−b′)/2; and the following mathematical formula (III) is satisfied:
m≦m′  (III).