Carbon-sulfur compound for positive electrode of lithium-sulfur battery and preparation and application of carbon-sulfur compound
A lithium-sulfur battery and composite technology, which is applied in the field of nanocomposite materials and its preparation, can solve the problems of low utilization rate of active material sulfur, restrictions on industrialized large-scale production, unsafe and environmentally friendly thiophene, etc., achieve good cycle stability, and benefit Diffusion and transport, the effect of improving electrochemical capacity
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[0043] Example 1
[0044] Dissolve the non-ionic surfactant P123 in ethanol and stir at 35℃ to completely dissolve it to form solution A; wherein the mass ratio of surfactant to ethanol is 1:5, add 0.05M hydrogen to solution A Sodium oxide solution, adjust the PH value to 8, and continue to stir for 1h to form solution B; add ethyl orthosilicate to solution B and stir for 1h to form solution C; wherein the mass ratio of surfactant to ethyl orthosilicate is 1:1; add 10nm20% silica gel solution and 20% phenolic resin solution to solution C, continue to stir for 3h to form solution D; wherein the mass ratio of P123 to silica gel solution is 1:1, silica gel and phenolic resin The mass ratio is 1:1; the solution D is aged at 90°C for 12h to obtain powder E; the powder E is kept constant at 400°C for 2h and 800°C for 2h under the protection of nitrogen gas to obtain powder F; After immersing and cleaning in a 5% hydrofluoric acid solution for 12 hours, and drying at 80°C, the carbon m...
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[0049] Example 2
[0050] Dissolve the non-ionic surfactant F127 in ethanol, stir at 40°C to make it completely dissolve, and form solution A; wherein the mass ratio of surfactant to ethanol is 1:5, add 1M of hydroxide to solution A Sodium solution, adjust the pH to 9, continue to stir for 1h to form solution B; add ethyl orthosilicate to solution B and stir for 1h to form solution C; wherein the mass ratio of surfactant to ethyl orthosilicate is 1 :2; Add 20nm40% silica gel solution and 20% phenolic resin solution to solution C, continue to stir for 3h to form solution D; wherein the mass ratio of F127 to silica gel solution is 1:1, the mass of silica gel and phenolic resin The ratio is 2:1; the solution D is aged at 100°C for 24h to obtain powder E; the powder E is kept constant at 350°C for 3h and 900°C for 3h under the protection of nitrogen gas to obtain powder F; After immersing and cleaning in% hydrofluoric acid solution for 24 hours, and drying at 80° C., the carbon mate...
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[0059] Example 3
[0060] Dissolve the non-ionic surfactant P123 in isopropanol, stir at 50°C to completely dissolve it to form solution A; wherein the mass ratio of surfactant to ethanol is 1:6, add 1M to solution A Potassium hydroxide solution, adjust the PH value to 11, continue to stir for 3h to form solution B; add methyl orthosilicate to solution B, stir for 3h to form solution C; wherein the mass ratio of surfactant to ethyl orthosilicate It is 1:3; add 30nm40% silica gel solution and 40% phenolic resin solution to solution C, continue to stir for 6h to form solution D; wherein the mass ratio of P123 to silica gel solution is 1:3, silica gel and phenolic resin The mass ratio is 4:1; the solution D is aged at 150℃ for 72h to obtain powder E; the powder E is kept at 350℃ for 5h and 1000℃ for 5h under the protection of nitrogen gas to obtain powder F; After being soaked and cleaned with a 1M sodium hydroxide solution at 80°C for 12 hours, and dried at 100°C, the carbon mater...
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