Electrochemical device and solid-state lithium ion rechargeable battery
An electrochemical device has a laminated body including: a positive electrode; a negative electrode; and a solid electrolyte sandwiched between the positive electrode and the negative electrode, wherein the laminated body contains water, a content of the water contained in the laminated body is 0.001 mass % or more and less than 0.3 mass % with respect to the laminated body, a part of the water is a bound water bonding with a constituent of the laminated body, and a ratio of the bound water in the water is 50% or more and 90% or less.
1. An electrochemical device comprising laminated body including:
a positive electrode;
a negative electrode; and
a solid electrolyte sandwiched between the positive electrode and the negative electrode, wherein
the laminated body contains water,
a content of the water contained in the laminated body is 0.001 mass % or more and less than 0.3 mass % with respect to the laminated body,
a part of the water is a bound water bonding with a constituent of the laminated body, and
a ratio of the bound water in the water is 50% or more and 90% or less.
2. The electrochemical device according to claim 1 , wherein the content of the water contained in the laminated body is 0.07 mass % or more and 0.25 mass % or less with respect to the laminated body.
3. The electrochemical device according to claim 2 , wherein the content of the bound water is 0.04 mass % or more and 0.18 mass % or less.
4. The electrochemical device according to claim 3 , wherein the ratio of the bound water in the water is 65% or more and 90% or less.
5. The electrochemical device according to claim 4 , wherein the solid electrolyte is a phosphate solid electrolyte.
6. The electrochemical device according to claim 3 , wherein the solid electrolyte is a phosphate solid electrolyte.
7. The electrochemical device according to claim 2 , wherein the ratio of the bound water in the water is 65% or more and 90% or less.
8. The electrochemical device according to claim 7 , wherein the solid electrolyte is a phosphate solid electrolyte.
9. The electrochemical device according to claim 2 , wherein the solid electrolyte is a phosphate solid electrolyte.
10. The electrochemical device according to claim 1 , wherein the content of the bound water is 0.005 mass % or more and 0.2 mass % or less.
11. The electrochemical device according to claim 10 , wherein the ratio of the bound water in the water is 65% or more and 90% or less.
12. The electrochemical device according to claim 11 , wherein the solid electrolyte is a phosphate solid electrolyte.
13. The electrochemical device according to claim 10 , wherein the solid electrolyte is a phosphate solid electrolyte.
14. The electrochemical device according to claim 1 , wherein the ratio of the bound water in the water is 65% or more and 90% or less.
15. The electrochemical device according to claim 14 , wherein the solid electrolyte is a phosphate solid electrolyte.
16. The electrochemical device according to claim 1 , wherein the solid electrolyte is a phosphate solid electrolyte.
17. A solid-state lithium ion rechargeable battery comprising the electrochemical device according to claim 1 .
18. The solid-state lithium ion rechargeable battery comprising the electrochemical device according to claim 17 , wherein relative densities of: a pair of a positive electrode layer and a negative electrode layer; and a solid electrolyte layer provided between the pair of the electrode layers are 80% or more.