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Preparation method of carbon-coated nitride porous ceramic
The invention provides a method for preparing carbon-coated nitride porous ceramic through arc discharge plasma magnetic filtration vapor deposition , belonging to the technical field of preparation of lithium-sulfur battery electrode materials. The method comprises the following steps: ball-milling and mixing titanium oxide powder, nanometer carbon black, a binder, a pore-forming agent and other powder with a ball mill; preparing a green body of an oxide porous ceramic by using a powder tabletting method via a tablet press; placing the green body in a tubular furnace for high-temperature-atmosphere sintering to obtain nitride porous ceramic; placing the nitride porous ceramic in a chemical vapor co-deposition device, and depositing S in a pore structure of the nitride porous ceramic to obtain a nitride porous ceramic sulfur-containing electrode; and finally, combining arc discharge plasma magnetic filtering vapor deposition with a solid source, coating the surface of the sulfur-containing nitride porous ceramic sulfur-containing electrode with a layer of carbon so as to prepare the carbon-coated nitride porous ceramic sulfur-containing electrode. According to the invention, nitride in the structure serves as a conductive framework, so the structural stability and the conductivity of a sulfur-containing carrier can be improved, and the nitride has excellent conversion and adsorption performance on polysulfide. Particularly, carbon coating is carried out on the surface of the nitride porous ceramic sulfur-containing electrode, so the shuttle effect of polysulfide can be further inhibited, and remarkable effects on improving the S content of a lithium-sulfur battery, prolonging the cycle life of the battery and the like are achieved.
一种弧光放电等离子体磁过滤气相沉积碳包覆氮化物多孔陶瓷的制备方法，属于锂硫电池电极材料制备技术领域，所述方法包括：将氧化钛粉体、纳米炭黑、粘结剂、造孔剂等粉体用球磨机球磨混合之后，利用压片机粉末压片的方法得到氧化物多孔陶瓷生坯；将生坯放置于管式炉中高温气氛烧结，得到氮化物多孔陶瓷；之后将氮化物多孔陶瓷置于化学气相共沉积装置中，在其孔隙结构中沉积S，得到氮化物多孔陶瓷含硫电极；最后利用弧光放电等离子体磁过滤气相沉积结合固体源，在含硫氮化物多孔陶瓷含硫电极表面包覆一层碳，制备得到碳包覆氮化物多孔陶瓷含硫电极，这种结构中的氮化物作为导电骨架不但可以提高含硫载体的结构稳定性和导电性能，而且氮化物本身对多硫化物的转化以及吸附性能方面表现优异。特别的，在氮化物多孔陶瓷含硫电极表面进行碳包覆，可以进一步抑制多硫化物的“穿梭效应”，对于提升锂硫电池S含量、电池循环寿命等方面有显著效果。
Preparation method of carbon-coated nitride porous ceramic
The invention provides a method for preparing carbon-coated nitride porous ceramic through arc discharge plasma magnetic filtration vapor deposition , belonging to the technical field of preparation of lithium-sulfur battery electrode materials. The method comprises the following steps: ball-milling and mixing titanium oxide powder, nanometer carbon black, a binder, a pore-forming agent and other powder with a ball mill; preparing a green body of an oxide porous ceramic by using a powder tabletting method via a tablet press; placing the green body in a tubular furnace for high-temperature-atmosphere sintering to obtain nitride porous ceramic; placing the nitride porous ceramic in a chemical vapor co-deposition device, and depositing S in a pore structure of the nitride porous ceramic to obtain a nitride porous ceramic sulfur-containing electrode; and finally, combining arc discharge plasma magnetic filtering vapor deposition with a solid source, coating the surface of the sulfur-containing nitride porous ceramic sulfur-containing electrode with a layer of carbon so as to prepare the carbon-coated nitride porous ceramic sulfur-containing electrode. According to the invention, nitride in the structure serves as a conductive framework, so the structural stability and the conductivity of a sulfur-containing carrier can be improved, and the nitride has excellent conversion and adsorption performance on polysulfide. Particularly, carbon coating is carried out on the surface of the nitride porous ceramic sulfur-containing electrode, so the shuttle effect of polysulfide can be further inhibited, and remarkable effects on improving the S content of a lithium-sulfur battery, prolonging the cycle life of the battery and the like are achieved.
一种弧光放电等离子体磁过滤气相沉积碳包覆氮化物多孔陶瓷的制备方法，属于锂硫电池电极材料制备技术领域，所述方法包括：将氧化钛粉体、纳米炭黑、粘结剂、造孔剂等粉体用球磨机球磨混合之后，利用压片机粉末压片的方法得到氧化物多孔陶瓷生坯；将生坯放置于管式炉中高温气氛烧结，得到氮化物多孔陶瓷；之后将氮化物多孔陶瓷置于化学气相共沉积装置中，在其孔隙结构中沉积S，得到氮化物多孔陶瓷含硫电极；最后利用弧光放电等离子体磁过滤气相沉积结合固体源，在含硫氮化物多孔陶瓷含硫电极表面包覆一层碳，制备得到碳包覆氮化物多孔陶瓷含硫电极，这种结构中的氮化物作为导电骨架不但可以提高含硫载体的结构稳定性和导电性能，而且氮化物本身对多硫化物的转化以及吸附性能方面表现优异。特别的，在氮化物多孔陶瓷含硫电极表面进行碳包覆，可以进一步抑制多硫化物的“穿梭效应”，对于提升锂硫电池S含量、电池循环寿命等方面有显著效果。
Preparation method of carbon-coated nitride porous ceramic
一种碳包覆氮化物多孔陶瓷的制备方法
WANG CHENG (author) / CHEN ZIBO (author) / HE QIAN (author) / HAN XURAN (author) / JIAO YUNFEI (author) / WU QIANG (author) / ZHANG TING (author) / LIU RUIQING (author) / YING SHIQIANG (author) / LI YI (author)
2021-09-14
Patent
Electronic Resource
Chinese
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