Preparation method of three-dimensional graphene-based iron vanadate
A technology of alkenyl vanadic acid and graphene, which is applied in the field of materials, can solve the problems of large sheet surface energy, easy folding and agglomeration of graphene sheets, and reduced specific surface area and electrical conductivity, so as to achieve large specific surface area and improve Effects of surface area utilization and electrical conductivity, capacity improvement and lifespan improvement
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0019] 1) Add 10g of deionized water to 0.5g of dispersant and mix, then add 5g of graphene oxide, ultrasonically disperse for 2h at a power of 300W and a temperature of 25°C, then add 1.3g of cross-linking agent, at a temperature of 150°C Under the hydrothermal reaction for 9h, a mixed solution was obtained;
[0020] 2) in 0.25L n-amyl alcohol, add 0.1L sodium dodecyl sulfate solution (0.1M, that is, the substance concentration of sodium dodecyl sulfate solution is 0.1M, the same below) to mix, then add metavanadic acid Aqueous ammonium solution (0.1M) and ferrous sulfate solution (0.1M) were 1L each, heated and stirred at 150°C for 3h, rinsed with ethanol 3 times, and the upper suspension was taken;
[0021] 3) Under the temperature condition of 20 ℃, add 6g of dodecyl dimethyl amine oxide to the mixed solution, fully stir until uniform, then add the suspension and mix well, then add 4g each of ammonium bicarbonate and ammonium nitrate, slowly Stir for 1h, freeze-dry for 12...
Embodiment 2
[0025] 1) Add 10g of deionized water to 0.5g of dispersant and mix, then add 5g of graphene oxide, ultrasonically disperse for 2h at a power of 300W and a temperature of 25°C, then add 1.3g of cross-linking agent, at a temperature of 170°C Under the hydrothermal reaction for 8h, a mixed solution was obtained;
[0026] 2) Add 0.1L sodium dodecyl sulfate solution (0.1M) to 0.3L n-amyl alcohol and mix, then add 0.8L ammonium metavanadate aqueous solution (0.1M) and 0.8L ferrous sulfate solution (0.1M) each. 1L, heated and stirred at 140°C for 4h, rinsed twice with ethanol, and took the upper suspension;
[0027] 3) Under the temperature condition of 20 ℃, add 7g of dodecyl dimethyl amine oxide to the mixed solution, fully stir until uniform, then add the suspension and mix well, then add 5g each of ammonium bicarbonate and ammonium nitrate, slowly Stir for 1h, freeze-dry for 13h, take out;
[0028] S4: quickly push the taken out dried material into a hydrogen atmosphere at 260°...
Embodiment 3
[0031] 1) Add 21g of deionized water to 0.7g of dispersant and mix, then add 5g of graphene oxide, ultrasonically disperse for 2h at a power of 300W and a temperature of 25°C, then add 1.4g of cross-linking agent, at a temperature of 170°C Under the hydrothermal reaction for 8h, a mixed solution was obtained;
[0032] 2) Add 0.1L sodium dodecyl sulfate solution (0.1M) to 0.2L n-amyl alcohol and mix, then add 1L ammonium metavanadate aqueous solution (0.1M) and 0.8L ferrous sulfate solution (0.1M), in Heating and stirring at 140°C for 3 hours, rinsed with ethanol for 3 times, and the upper suspension was taken;
[0033] 3) Under the temperature condition of 25 ℃, add 5g of dodecyl dimethyl amine oxide to the mixed solution, fully stir until uniform, then add the suspension and mix well, then add 5g of ammonium bicarbonate and 4g of ammonium nitrate, slowly Stir for 0.5h, freeze-dry for 15h, take out;
[0034] S4: quickly push the taken-out dried material into a hydrogen atmos...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More