Oxide ion conductor and electrochemical device
AssigneeKabushiki Kaisha Toyota Chuo Kenkyusho
InventorsSeiji Kajita, Nobuko Ohba, Akitoshi Suzumura, Shin Tajima, Ryoji Asahi
Life of this patent
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Abstract
An oxide ion conductor has a X3Z2(TO4)3 structure, where X is a divalent metal element, Z is a trivalent metal element, and T is a tetravalent metal element, and has a composition expressed by (X1-xAx)3(Z1-yBy)2(T1-zCz)3O12+δ where the element X is Ca, Fe, Gd, Ba, Sr, Mn, and/or Mg, the element Z is Al, Cr, Fe, Mn, V, Ga, Co, Ni, Ru, Rh, and/or Ir, the element T is Si and/or Ge, an element A is La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and/or Sr, an element B is Zn, Mn, Co, Ru, and/or Rh, and an element C is Si, Al, Ga, and/or Sn, 0≤x≤0.2, 0≤y≤0.2, and 0≤z≤0.2 are satisfied, and δ is a value securing electrical neutrality.
Claims4
An oxide ion conductor, comprising an oxide having a X3Z2(TO4)3 structure, where X is a divalent metal element, Z is a trivalent metal element, and T is a tetravalent metal element,
- the oxide ion conductor having a composition expressed by Formula (1)
- (X1-xAx)3(Z1-yBy)2(T1-zCz)3O12+δ (1)
- where
- (a) the element X is Mg, the element Z is Al, and the element T is Si,
- (b) the element X is Mg, the element Z is Ga, and the element T is Ge, or
- (c) the element X is Ca, the element Z is Ga, and the element T is Ge,
- an element A is different from the element X and at least one element selected from a group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sr,
- an element B is different from the element Z and at least one element selected from a group consisting of Zn, Mn, Co, Ru, and Rh,
- an element C is different from the element T and at least one element selected from a group consisting of Si, Al, Ga, and Sn,
- 0≤x≤0.2, 0≤y≤0.2, and 0≤z≤0.2 are satisfied, and
- δ is a value securing electrical neutrality.
An oxide ion conductor, comprising an oxide having a X3Z2(TO4)3 structure, where X is a divalent metal element, Z is a trivalent metal element, and T is a tetravalent metal element,
- the oxide ion conductor having a composition expressed by Formula (1.1)
- (Ca1-xAx)3(Fe1-yBy)2(Ge1-zCz)3O12+δ (1.1)
- where
- the element A is at least one element selected from a group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sr,
- the element B is at least one element selected from a group consisting of Zn, Mn, Co, Ru, and Rh,
- the element C is at least one element selected from a group consisting of Si, Al, Ga, and Sn,
- 0≤x≤0.2, 0≤y≤0.2, and 0≤z≤0.2 are satisfied, with the proviso that at least one of x, y and z is at least 0.01, and
- δ is a value securing electrical neutrality.
Dependencies are inferred from the claim text.