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  • 产品名称: 氟化石墨烯 Fluorographene
  • 产品编号: 02001
  • 上架时间: 2016-09-01
  • 浏览次数: 1344

    氟化石墨烯是一种重要的新型石墨烯衍生物,分子式为(CFx)n密度为0.15-0.3 g/cm3它保留了石墨烯的蜂窝状碳骨架,部分碳原子仍以sp2杂化相互作用,有氟原子作用的碳原子由原来的sp2杂化变为sp3杂化,氟原子与碳原子以共价键的形式作用,分别位于碳碳骨架的两侧。在石墨烯中引入氟原子后,形成C-F键,石墨烯片层上的大π键结构被破坏,改变了石墨烯本身的结构,导致与石墨烯不同的物理和化学性质。

    氟化石墨烯与石墨烯相比,虽然碳原子的杂化方式由sp2转变为sp3,但同时也保留了石墨烯的片层结构。因此,氟化石墨烯不但具有石墨烯一般大的比表面积、高的杨氏模量和断裂强度等优良物理和化学性质,同时由于氟原子的引入极大地降低了石墨烯表面能,极大地增强了疏水疏油性,提高了热稳定性、化学稳定性及抗腐蚀能力。氟化石墨烯兼具石墨烯的二维片层结构和聚四氟乙烯的某些性能,也有人称之为“二维特氟龙”。氟化石墨烯的这些独特性能使其可广泛应用于抗磨润滑、耐高温腐蚀涂层等,同时由于氟化石墨烯的较长带隙宽使其在纳米电子器件、光电子器件以及热电装置等领域具有潜在的应用前景。此外,由于氟化石墨烯基氟碳材料具有发达的比表面和孔结构,且氟含量的不同对能带结构具有可调节性,导致其具有独特的导电性能,用于锂一次电池正极材料时具有与电解液接触界面大、锂离子扩散速度快等特点,用氟化石墨烯做正极材料的锂原电池具有能量密度高、放电平台高且平稳、使用温度范围宽、存储寿命极长等优点,在航空航天和高端民用领域有极大的应用潜力。

 

项目

单位

指标

(CFx)n

wt.%

≥99%

氟含量

wt.%

依客户要求定制

粒度(D50)

μm

≤15

金属杂质含量

ppm

≤100

层数

 

10~20

放电平台(C/10放电倍率)

V

≥2.8(功率型);≥2.6(能量型)

比容量(C/10放电倍率)

mAh/g

>700(功率型);>830(能量型)

 

        氟化石墨烯用于锂一次电池正极材料时具有与电解液接触界面大、锂离子扩散速度快等特点,用氟化石墨烯做正极材料的锂原电池具有能量密度高、放电平台高且平稳、使用温度范围宽、存储寿命极长等优点,在航空航天和高端民用领域有极大的应用潜力。此外,氟化石墨烯在重防腐涂料、自清洁材料、润滑油/脂添加剂等方面具有极大的应用潜力。

    包装规格有10g、50g、100g、500g、1kg、5kg和10kg以上规格,以满足科研院所及生产型企业的不同要求。根据量的不同有塑料瓶直接包装、双层塑料袋包装、外套塑料桶或纸板桶包装。产品最小起订量10g


        Fluorographene is an important graphene derivative with molecular formula (CFx)n and density of 0.15-0.3 g/cm3. It retains the honeycomb carbon skeleton of graphene, some carbon atoms still interact with sp2 hybridization, and carbon atoms with fluorine atoms change from sp2 hybridization to sp3 hybridization. Fluorine atoms interact with carbon atoms in the form of covalent bonds, which are located on both sides of the carbon-carbon skeleton. When fluorine atoms are introduced into graphene to form a C-F bond, the large π bond of graphene is destroyed, changing the structure of graphene itself, resulting in different physical and chemical properties from graphene.

       Compared with graphene, fluorographene retained the lamellar structure of graphene although the carbon atoms were hybridized from sp2 to sp3. As a result, fluorographene has not only large specific surface area, high young modulus and fracture strength and other excellent physical and chemical properties like graphene, at the same time due to the introduction of fluorine atoms, the surface energy of graphene was greatly reduced, the property for hydrophobic and oleophobic was greatly enhanced, while the thermal stability, chemical stability and corrosion resistance were largely improved. Fluorographene combine the two-dimensional lamellar structure of graphene with some properties of PTFE, also known as “Two-dimensional Teflon”. Due to its unique properties, fluorographene can be widely used in the fields of anti-wear lubrication, high temperature corrosion resistant coating, at the same time, due to its wider bandgap, fluorographene has potential applications prospect in nano-electronic devices, photoelectronic devices, thermoelectric devices and other fields. In addition, because the fluorocarbon materials have fairly developed specific surface and pore structure and unique conductivity, the lithium primary batteries will have large contact interface with electrolyte and fast lithium ion diffusion speed, when fluorographene used as cathode material of lithium batteries. These lithium primary batteries have the advantages of high energy density, high discharge voltage, stable discharge curve, wide operating temperature, extremely long shelf life, which has great application potential in the aerospace and high-end civil field.

 

Items

Unit

Index

(CFx)n

wt.%

≥99%

Fluorine content

wt.%

Customized according to customer requirements

Particle size (D50)

μm

≤15

Metal impurities

ppm

≤100

Layer number

 

10~20

Discharge plateau(Discharge rate C/10)

V

≥2.8(Power-type fluorographite)

≥2.6(Energy-type fluorographite)

Specific capacity(Discharge rate C/10)

mAh/g

>700(Power-type fluorographite)

>830(Energy-type fluorographite)

 

     When fluorographene used as cathode material of lithium primary batteries, the batteries will have large contact interface with electrolyte and fast lithium ion diffusion speed. These lithium primary batteries have the advantages of high energy density, high discharge voltage, stable discharge curve, wide operating temperature, extremely long shelf life, which has great application potential in the aerospace and high-end civil field. In addition, fluorographene has great application potential in heavy anticorrosive coatings, self-cleaning materials and lubricating oil/grease additives.

      The packing specifications are 10g, 50g, 100g, 500g, 1kg, 2kg, 5kg and 10kg above, to meet the different requirements of scientific research institutes and production enterprises. According to different amount, fluorographite are packed by plastic bottles, double plastic bags, plastic bucket or cardboard bucket. The minimum order quantity is 10g.