Solid ion conductor which has a garnet-like crystal structure and has the stoichiometric composition L
The invention is directed to a solid ion conductor which has a garnet-like crystal structure and has the stoichiometric composition L 7+x A x G 3−x Zr 2 O 12 , wherein L is in each case independently a monovalent cation, A is in each case independently a divalent cation, G is in each case independently a trivalent cation, 0≦x≦3 and O can be partly or completely replaced by divalent or trivalent anion.
1. A solid ion conductor which has a garnet-like crystal structure and has the stoichiometric composition L 7+x A x G 3−x Zr 2 O 12 , where
L is in each case independently a monovalent cation,
A is in each case independently a divalent cation,
G is in each case independently a trivalent cation,
0≦x≦3 and
O can be partly or completely replaced by divalent or trivalent anion, wherein the ion conductivity is greater than 4×10 −5 Scm −1 at 22° C.
2. The solid ion conductor according to claim 1 , wherein 0≦x≦1 and O can be partly or completely replaced by divalent anion or N 3− .
3. The solid ion conductor according to claim 1 , wherein L is in each case independently is Li, Na or K.
4. The solid ion conductor according to claim 3 , wherein L=Na.
5. The solid ion conductor according to claim 1 , wherein A is a divalent alkaline earth metal cation.
6. The solid ion conductor according to claim 1 , wherein A is Ca, Sr and/or Ba.
7. The solid ion conductor according to claim 1 , wherein the stoichiometric composition is Li 7 La 3 Zr 2 O 12 .
8. An electrode which has been coated with the solid ion conductor as claimed in claim 1 .
9. A battery comprising one or more electrodes according to claim 8 .
10. The electrode according to claim 8 , wherein the garnet-like crystal structure has the stoichiometric composition L 7+x A x G 3−x Zr 2 O 12 , where
L is in each case independently a monovalent cation,
A is in each case independently a divalent cation,
G is in each case independently a trivalent cation,
0≦x≦3 and
O can be partly or completely replaced by divalent or trivalent anion.
11. A battery comprising one or more electrodes according to claim 10 .