Electrode material for batteries, electrode material paste for batteries, method for manufacturing the electrode material for batteries, dye-sensitized solar cell, and storage battery
The present invention provides an electrode material for batteries made from tungsten oxide powder, wherein the tungsten oxide powder has a first peak present within a wavenumber range of 268 to 274 cm −1 , a second peak present within a wavenumber range of 630 to 720 cm −1 , and a third peak present within a wavenumber range of 800 to 810 cm −1 , when a Raman spectroscopic analysis method is performed on the electrode material.
1. An electrode material for batteries made from tungsten oxide powder, wherein the tungsten oxide powder has a first peak present within a wavenumber range of 268 to 274 cm −1 , a second peak present within a wavenumber range of 630 to 720 cm −1 , a third peak present within a wavenumber range of 800 to 810 cm −1 , a fourth peak present within a wavenumber range of 130 to 140 cm −1 , and a fifth peak present within a wavenumber range of 930 to 940 cm −1 , when a Raman spectroscopic analysis method is performed on the electrode material, and
wherein a BET specific surface area of the electrode material is 15 m 2 /g or larger.
2. The electrode material for batteries according to claim 1 , wherein a half-value width of the first peak is 8 to 25 cm −1 .
3. The electrode material for batteries according to claim 1 , wherein a half-value width of the second peak is 15 to 75 cm −1 .
4. The electrode material for batteries according to claim 1 , wherein a half-value width of the third peak is 15 to 50 cm −1 .
5. The electrode material for batteries according to claim 1 , wherein the fourth peak is 0.10 or higher in intensity ratio (I 4 /I 3 ) which is a ratio of an intensity I 4 of the fourth peak to an intensity I 3 of the third peak.
6. The electrode material for batteries according to claim 1 , wherein the fifth peak is 0.04 or higher in intensity ratio (I 5 /I 3 ) which is a ratio of an intensity I 5 of the fifth peak to an intensity I 3 of the third peak.
7. The electrode material for batteries according to claim 1 , wherein the electrode material is used in a dye-sensitized solar cell or a storage battery.
8. An electrode material paste for batteries, including an electrode material for batteries according to claim 1 .
9. The electrode material paste for batteries according to claim 8 , including a binder whose pyrolysis rate at 500° C. is 99.0% or higher.
10. The electrode material paste for batteries according to claim 8 , wherein the electrode material paste has a viscosity of 800 to 10000 cps.
11. A method for manufacturing an electrode material for batteries according to claim 1 , the method comprising:
a step of preparing metallic tungsten powder or tungsten compound powder; and
a plasma treatment step of plasma-treating the metallic tungsten powder or the tungsten compound powder in an oxygen-containing ambient atmosphere.
12. The method for manufacturing an electrode material for batteries according to claim 11 , the method further comprising a heat treatment step of performing a heat treatment at 300 to 1000° C. in an oxygen-containing ambient atmosphere, following the plasma treatment step.
13. The method for manufacturing an electrode material for batteries according to claim 12 , wherein the heat treatment step is a step in which one type of treatment selected from among heat treatment in atmosphere, heat treatment in a pressurized ambient atmosphere, heat treatment in water, and microwave heat treatment, is performed.
14. A dye-sensitized solar cell using an electrode material for batteries according to claim 1 .
15. A storage battery using an electrode material for batteries according to claim 1 .