Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of metal nanoparticle modified graphite material and three-dimensional graphite skeleton pole piece
The invention provides a preparation method of a nano-metal modified graphite framework material, which comprises the following steps: mixing graphite, metal salt, polyvinylpyrrolidone and water, fully stirring, and carrying out ultrasonic treatment to obtain a mixed solution; the mixed solution is subjected to spray drying, obtained solid powder is annealed at the temperature of 495-505 DEG C, cooling and grinding are conducted, and the nano-metal modified graphite framework material is obtained. By controlling the proportion of the graphite, the metal salt and the PVP, the graphite is modified, the metal nanoparticle modified graphite with uniform distribution and consistent particle size is obtained, and the three-dimensional graphite skeleton pole piece obtained by coating has abundant gaps and can accommodate the volume expansion of metal lithium. Graphite is adopted as a deposition substrate, lithium is preferentially inserted between graphite layers and then deposited on the surface of the graphite, and the graphite can store a part of lithium, so that a part of problems caused by lithium metal deposition are avoided, and the three-dimensional structure of the graphite pole piece is more stable.
本发明提供一种纳米金属修饰石墨骨架材料的制备方法，包括：将石墨、金属盐、聚乙烯吡咯烷酮和水混合，充分搅拌后超声，得到混合溶液；将混合溶液喷雾干燥，得到的固体粉末在495～505℃下退火，冷却后研磨，得到纳米金属修饰石墨骨架材料。本发明通过控制石墨、金属盐和PVP的配比，对石墨进行了修饰，得到分布均匀、颗粒大小一致金属纳米颗粒修饰的石墨，通过涂布，得到的三维石墨骨架极片具有丰富的空隙，能够容纳金属锂的体积膨胀。本发明采用石墨作为沉积基底，锂优先插进石墨层间，然后沉积在石墨表面，石墨能够储存一部分锂，从而避免锂金属沉积带来的一部分问题，还能使得石墨极片其三维结构更加稳定。
Preparation method of metal nanoparticle modified graphite material and three-dimensional graphite skeleton pole piece
The invention provides a preparation method of a nano-metal modified graphite framework material, which comprises the following steps: mixing graphite, metal salt, polyvinylpyrrolidone and water, fully stirring, and carrying out ultrasonic treatment to obtain a mixed solution; the mixed solution is subjected to spray drying, obtained solid powder is annealed at the temperature of 495-505 DEG C, cooling and grinding are conducted, and the nano-metal modified graphite framework material is obtained. By controlling the proportion of the graphite, the metal salt and the PVP, the graphite is modified, the metal nanoparticle modified graphite with uniform distribution and consistent particle size is obtained, and the three-dimensional graphite skeleton pole piece obtained by coating has abundant gaps and can accommodate the volume expansion of metal lithium. Graphite is adopted as a deposition substrate, lithium is preferentially inserted between graphite layers and then deposited on the surface of the graphite, and the graphite can store a part of lithium, so that a part of problems caused by lithium metal deposition are avoided, and the three-dimensional structure of the graphite pole piece is more stable.
本发明提供一种纳米金属修饰石墨骨架材料的制备方法，包括：将石墨、金属盐、聚乙烯吡咯烷酮和水混合，充分搅拌后超声，得到混合溶液；将混合溶液喷雾干燥，得到的固体粉末在495～505℃下退火，冷却后研磨，得到纳米金属修饰石墨骨架材料。本发明通过控制石墨、金属盐和PVP的配比，对石墨进行了修饰，得到分布均匀、颗粒大小一致金属纳米颗粒修饰的石墨，通过涂布，得到的三维石墨骨架极片具有丰富的空隙，能够容纳金属锂的体积膨胀。本发明采用石墨作为沉积基底，锂优先插进石墨层间，然后沉积在石墨表面，石墨能够储存一部分锂，从而避免锂金属沉积带来的一部分问题，还能使得石墨极片其三维结构更加稳定。
Preparation method of metal nanoparticle modified graphite material and three-dimensional graphite skeleton pole piece
一种金属纳米颗粒修饰石墨材料的制备方法和三维石墨骨架极片
DONG DAOJIE (Autor:in) / ZHAO FEI (Autor:in) / ZHOU XUFENG (Autor:in) / LIU ZHAOPING (Autor:in)
22.10.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
H01M
Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie
,
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
/
B22F
Verarbeiten von Metallpulver
,
WORKING METALLIC POWDER
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C04B
Kalk
,
LIME
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