Sulfur/carbon composite material and preparation method and application thereof
A technology of carbon composite materials and hollow carbon, applied in the direction of sulfur compounds, chemical instruments and methods, nano-carbon, etc., can solve the problems of capacity fading, self-discharge, active material consumption, etc.
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[0034] The invention provides a kind of preparation method of sulfur / carbon composite material, comprises the following steps:
[0035] performing the first mixing of tetrapropyl orthosilicate and the mixed solvent to obtain the first mixed solution;
[0036] The resorcinol, formaldehyde, polypyrrole tube and the first mixed solution are mixed for the second time, and a hydrolysis condensation reaction occurs to obtain a polypyrrole / hollow carbon nanosphere intermediate product; the polypyrrole / hollow carbon nanosphere intermediate product It includes polypyrrole, silicon dioxide and RF polymer layer; the RF polymer layer is a polymer layer of resorcinol and formaldehyde; the silicon dioxide and RF polymer layer form a core-shell structure, and the core of the core-shell structure is Silica, the core-shell structure can be a compound formed by silicon dioxide and RF polymer layer; the polypyrrole is composited with the RF polymer layer in the core-shell structure;
[0037] Af...
Embodiment 1
[0065] Under the condition of stirring, 3.46mL tetrapropyl orthosilicate and mixed solvent (70mL ethanol, 10mL deionized water and 3mL ammoniacal water with a substance concentration of 11.1mol / L) were mixed for the first time (10min) to obtain the first a mixture;
[0066] Under stirring conditions, sequentially add 0.4g resorcinol, 0.56mL formaldehyde and 0.1g polypyrrole tube into the first mixed solution, continue to stir for 24h, centrifuge to obtain a solid substance, and successively use deionized water Wash with ethanol three times, dry (50 ℃), obtain polypyrrole / hollow carbon nanosphere intermediate product;
[0067] Under an argon atmosphere, the polypyrrole / hollow carbon nanosphere intermediate product was carbonized (600°C, 5h), and after standing in a sodium hydroxide solution (2mol / L) for 24h, centrifuged to obtain a solid substance , washed with deionized water and ethanol in turn until neutral, and dried (60°C) to obtain polypyrrole / hollow carbon nanospheres; ...
Embodiment 2
[0072] Under stirring conditions, 6.92mL tetrapropyl orthosilicate and mixed solvent (140mL ethanol, 20mL deionized water and 6mL ammonia water with a mass concentration of 11.1mol / L) were mixed for the first time (15min) to obtain the first mixed liquid;
[0073] Under stirring conditions, sequentially add 0.8g resorcinol, 1.12mL formaldehyde and 0.2g polypyrrole tube into the first mixed liquid, continue to stir for 36h, centrifuge to obtain a solid substance, and successively use deionized water Wash with ethanol three times, dry (60 ℃), obtain polypyrrole / hollow carbon nanosphere intermediate product;
[0074] Under an argon atmosphere, the polypyrrole / hollow carbon nanosphere intermediate product was carbonized (700°C, 7h), left to stand in a sodium hydroxide solution (3mol / L) for 36h, and centrifuged to obtain a solid substance , followed by washing with deionized water and ethanol to neutrality, and drying (70°C) to obtain polypyrrole / hollow carbon nanospheres;
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