A method for preparing cobalt tetroxide/carbon composite material by using lithium cobalt oxide waste battery positive electrode material
A technology of cobalt trioxide and carbon composite materials, which is applied in battery recycling, recycling technology, hybrid capacitor electrodes, etc., can solve the problems of difficult product purity, difficult washing of impurity ions, and high production costs, achieving low cost, simple operation, The effect of easy industrial scale production
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0032] Put the waste positive active material of lithium cobaltate battery into the 18mol / L sulfuric acid leaching solution dissolved with hydrogen peroxide, react at 65°C for 4 hours, and filter after cooling to room temperature. Neutralize to pH 3.0 with ammonia water. Heat the above solution to 50°C, add the solution of dissolved β-naphthol and sodium nitrite to produce a reddish-brown precipitate, filter and wash the precipitate to obtain a red powder. The above dry powder is heated to 500° C. under nitrogen protection and kept for 3 hours, and then cooled to room temperature to obtain the product. According to the ICP test, the tricobalt tetroxide content is 79%, and the cobalt ion concentration in the remaining filtrate is 0.05g / L.
[0033] figure 1 This is the SEM image of the cobalt tetroxide / carbon composite material obtained in Example 1. The cobalt tetroxide / carbon composite material prepared on the surface is an amorphous composite material with a size in the ran...
Embodiment 2
[0035] Put the waste positive active material of lithium cobaltate battery into the 18mol / L sulfuric acid leaching solution dissolved with potassium permanganate, react at 65°C for 6 hours, and filter after cooling to room temperature. The concentration of the above-mentioned filtered solution is Neutralize to pH 3.2 with 27% ammonia water. Heat the above solution to 60°C, add the solution of dissolved β-naphthol and potassium nitrite to produce a reddish-brown precipitate, filter and wash the precipitate to obtain a red powder. The above dry powder was heated to 550° C. under nitrogen protection and kept at this temperature for 4 hours, and then cooled to room temperature to obtain the product. Tested by ICP, wherein the tricobalt tetroxide content is 60%, and the cobalt ion concentration in the remaining filtrate is 0.07g / L.
[0036] Figure 4 The cobalt tetroxide / carbon composite material obtained in Example 2 is used as a supercapacitor electrode material, and has good s...
Embodiment 3
[0038] Put the waste positive active material of lithium cobaltate battery into the 18mol / L sulfuric acid leaching solution dissolved with potassium dichromate, react at 65°C for 4 hours, and filter after cooling to room temperature. The concentration of the above-mentioned filtered solution is 27% potassium hydroxide to neutralize to pH 3.4. Heat the above solution to 68°C, add the solution of dissolved β-naphthol and sodium nitrite to produce a reddish-brown precipitate, filter and wash the precipitate to obtain a red powder. The above dry powder was heated to 650°C under the protection of nitrogen and kept at this temperature for 6 hours, then cooled to room temperature to obtain the product. Tested by ICP, wherein the tricobalt tetroxide content is 80%, and the cobalt ion concentration in the remaining filtrate is 0.03g / L.
[0039] Figure 5 The cobalt tetroxide / carbon composite material obtained in Example 3 is used as a supercapacitor electrode material, and has good s...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More