Metal composite oxide with novel crystal structure and their use as ionic conductors
AssigneeLG Chem, Ltd.
InventorsSeung Hong, Yun Roh, Eung Lee, Mi Park
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Abstract
Disclosed is metal composite oxides having the new crystal structure. Also disclosed are ionic conductors including the metal composite oxides and electrochemical devices comprising the ionic conductors. The metal composite oxides have an ion channel formed for easy movement of ions due to crystallographic specificity resulting from the ordering of metal ion sites and metal ion defects within the unit cell. Therefore, the metal composite oxides according to the present invention are useful in an electrochemical device requiring an ionic conductor or ionic conductivity.
Claims20
A metal composite oxide having the new crystal structure characterized by conditions (a) to (c):
- (a) a space group of Fd-3m (no. 227);
- (b) a unit cell parameter of 17.0±1.0 Å;
- and
- (c) crystallographic positions in a unit cell occupied by cations 8b, 48f, 32e, 16d and 16c with site occupancies of greater than 0 and less than or equal to 1, wherein the coordinates of cations (X, Y, Z) are as follows:
- 8b (⅜, ⅜, ⅜),
- 48f(x, ⅛, ⅛), wherein 0.37≦x≦0.43,
- 32e (x, x, x), 0.20≦x≦0.26,
- 16d (½, ½, ½), and
- 16c (0, 0, 0).
An Ionic conductor forming an ion channel by the ordering of metal defects in a unit cell.
Dependencies are inferred from the claim text.