Method for preparing metal chalcogenide and cathode electrocatalyst containing the metal chalcogenide

Abstract

This disclosure provides a method for preparing a metal chalcogenide and a cathode electrocatalyst containing the metal chalcogenide. The method for preparing the metal chalcogenide includes the following steps: providing an ingot sulfur and a foamed nickel in a quartz tube; vacuum sealing the quartz tube and placing it in a tube furnace; and holding the tube furnace at 450°C to 650°C for 60 to 90 minutes and then allowing it to cool naturally.

Claims

1. A method for preparing a metal chalcogenide, comprising the following steps: providing a sulfur ingot and a foamed nickel in a quartz tube; vacuum sealing the quartz tube and placing it in a tube furnace; and holding the tube furnace at 450°C to 650°C for 60 to 90 minutes and then allowing it to cool naturally.

2. The preparation method as described in claim 1, wherein, The metal chalcogenide comprises nickel disulfide (Ni3S2).

3. The preparation method as described in claim 1, wherein, The atomic percentage of sulfur in the sulfur ingot to nickel in the foamed nickel is 1.5-2.5:2.5-3.

5.

4. The preparation method as described in claim 3, wherein, The atomic percentage of sulfur in the sulfur ingot to nickel in the foamed nickel is 1.8-2.2:2.8-3.

2.

5. The preparation method as described in claim 1, wherein, The heating rate of this tubular furnace is 3°C / min to 5°C / min.

6. The preparation method as described in claim 1, wherein, The tubular furnace is held at 500°C to 600°C for 70 to 80 minutes and then naturally cooled.

7. The preparation method as described in claim 1, wherein, The quartz tube has a length in which the sulfur ingot and the foamed nickel are separated by a distance, and the ratio of the distance to the length is greater than or equal to 0.

5.

8. The preparation method as described in claim 7, wherein, The ratio of this distance to this length is greater than or equal to 0.

8.

9. The preparation method as described in claim 7, wherein, The distance is greater than or equal to 8 centimeters.

10. A cathode electrocatalyst comprising a metal chalcogenide as prepared as claimed in claim 1, wherein, The metal chalcogenide comprises nickel disulfide (Ni3S2).

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