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PREPARATION METHOD OF COMPOSITE MATERIAL HAVING NITROGEN-DOPED GRAPHENE/ZINC HYDROXIDE/HOLLOW SULFUR PARTICLES
PREPARATION METHOD OF COMPOSITE MATERIAL HAVING NITROGEN-DOPED GRAPHENE/ZINC HYDROXIDE/HOLLOW SULFUR PARTICLES
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机译：掺氮石墨烯/氢氧化锌/空心硫颗粒的复合材料的制备方法
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摘要
Provided in the present invention is a preparation method of a composite material having nitrogen-doped graphene/zinc hydroxide/hollow sulfur particles, the method comprising the following steps: step (1), adding sulfur powder into carbon disulfide, and stirring and dissolving the same to obtain a homogeneous solution; step (2), ball milling high purity nickel powder by means of a high energy ball mill, adding the ball-milled product into the solution, stirring the same to form a homogeneous suspension, performing mechanical stirring, and spraying and drying to obtain sulfur-coated spherical particles; step (3), adding the spherical particles into a solution added with iron chloride, stirring to react, and rinsing with water and filtering; and step (4), adding the filtered-out precipitate into a solution containing zinc chloride, urea, and a surfactant, stirring to form a homogeneous suspension, heating and stirring to react, and performing centrifugation and water rinsing to obtain sulfur particles coated with zinc hydroxide. The composite material is designed to have a hollow structure to reserve space for volume expansion of the sulfur material during a charging or discharging process, thus effectively improving electrochemical properties.
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