Lithium-sulfur battery negative electrode and lithium-sulfur battery containing it
A lithium-sulfur battery and negative electrode technology, applied in the field of chemical power sources, can solve the problems of active material loss and limited effect, and achieve the effects of improving sulfur utilization rate, improving cycle performance and service life, and suppressing shuttle effect
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Embodiment 1
[0018] 6g trichlorosilane, 15g methanol and 20g of solvent benzene were added to the stirring reactor, and dissolved by heating under stirring. After the end of the reaction, the heat distillation is carried out, the solvent is distilled and recycled, and the remaining product is cooled to give trimethoxysilane. In a 250 ml four-neck bottle, take 15g of trimethoxysilane, 15g of 1,1,2-trifluoro-1-butene and 1g of initiator, under the protection of dry nitrogen, stirring non-stop, and heating to 40 ° C, insulation for 2h, and then cooled to room temperature to obtain the addition of reactants. In a 2L three-neck flask equipped with a condenser, agitator and thermometer, the resulting addition reaction 20g and 10g thiourea is added for reaction, reflux at 110 °C for 10h, cool to 60 °C, through ammonia, when the reaction is no longer hot, stop ammonia gas. Then filtered, the filtrate distilled under reduced pressure, take 85 °C / 0.80 kPa fraction.
[0019] Add 15mL of thiolated tetra...
Embodiment 2
[0022] 4.5g trichlorosilane, 10g methanol and 15g of solvent benzene were added to the stirring reactor, and dissolved by heating under stirring. After the end of the reaction, the heat distillation is carried out, the solvent is distilled and recycled, and the remaining product is cooled to give trimethoxysilane. In a 250 ml four-neck bottle, take 12.5g of trimethoxysilane, 12.5g of 1,1,2-trifluoro-1-butene and 0.75g of initiator, under the protection of dry nitrogen, stirring non-stop, and heating to 40 ° C, incubated for 2h, and then cooled to room temperature to give the addition of the reactants. In a 2L three-neck flask equipped with a condenser, agitator and thermometer, the resulting addition reactants 17.5g and 8g thiourea are added for reaction, reflux at 105 °C for 9h, cooled to 60 °C, ammonia is introduced, and when the reaction is no longer hot, the ammonia gas is stopped. Then filtered, the filtrate distilled under reduced pressure, take 83.5 °C / 0.75kPa fraction.
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Embodiment 3
[0026]3g of trichlorosilane, 5g of methanol and 10g of solvent benzene were added to the stirring reactor, and dissolved by heating under stirring. After the end of the reaction, the heat distillation is carried out, the solvent is distilled and recycled, and the remaining product is cooled to give trimethoxysilane. In a 250 ml four-neck bottle, take 10g of trimethoxysilane, 10g of 1,1,2-trifluoro-1-butene and 0.5g initiator, under the protection of dry nitrogen, stirring continuously, and heating to 30 ° C, insulation for 1h, and then cooled to room temperature to obtain an addition of reactants. In a 2L three-neck flask equipped with a condenser, agitator and thermometer, the resulting addition reactants 15g and 6g thiourea are added for reaction, reflux at 100 °C for 8h, cooled to 60 °C, through ammonia, when the reaction is no longer hot, stop ammonia gas. Then filtered, the filtrate distilled under reduced pressure, take 82 °C / 0.67 kPa fraction.
[0027] Add 10mL of thiola...
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