氟化石墨烯是一種重要的新型石墨烯衍生物。氟化石墨烯與石墨烯相比，雖然碳原子的雜化方式由sp
2轉(zhuǎn)變?yōu)閟p
3，但同時(shí)也保留了石墨烯的片層結(jié)構(gòu)。因此，氟化石墨烯不但具有石墨烯一般大的比表面積，同時(shí)由于氟原子的引入極大地降低了石墨烯表面能，極大地增強(qiáng)了疏水疏油性，提高了熱穩(wěn)定性、化學(xué)穩(wěn)定性及抗腐蝕能力。氟化石墨烯的這些獨(dú)特性能使其可廣泛應(yīng)用于抗磨潤(rùn)滑、耐高溫腐蝕涂層等，同時(shí)由于氟化石墨烯的較長(zhǎng)帶隙寬使其在納米電子器件、光電子器件以及熱電裝置等領(lǐng)域具有潛在的應(yīng)用前景。此外，由于氟化石墨烯基氟碳材料具有發(fā)達(dá)的比表面和孔結(jié)構(gòu)，且氟含量的不同對(duì)能帶結(jié)構(gòu)具有可調(diào)節(jié)性，導(dǎo)致其具有獨(dú)特的導(dǎo)電性能，用于鋰一次電池正極材料時(shí)具有與電解液接觸界面大、鋰離子擴(kuò)散速度快等特點(diǎn)，用氟化石墨烯做正極材料的鋰原電池具有能量密度高、放電平臺(tái)高且平穩(wěn)、使用溫度范圍寬、存儲(chǔ)壽命極長(zhǎng)等優(yōu)點(diǎn)，在航空航天和高端民用領(lǐng)域有極大的應(yīng)用潛力。
Fluorographene is an important graphene derivative. Compared with graphene, fluorographene retained the lamellar structure of graphene although the carbon atoms were hybridized from sp
2 to sp
3. As a result, fluorographene has not only large specific surface area, 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. 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.
電池性能 Battery performance
氟化石墨烯作為正極材料應(yīng)用于鋰氟化碳電池，在C/10的放電倍率下，可適用于能量型（放電平臺(tái)≥2.6V，比容量＞800mAh/g）和功率型（放電平臺(tái)≥2.85V，比容量＞750mAh/g）一次電池。
Fluorographene is used as cathode material of lithium-fluorocarbon batteries, at the discharge rate of C/10, it can be applied in energy-type and power-type primary batteries. The discharge platform of energy-type fluorographene is equal or greater than 2.6V, the specific capacity is more than 800mAh/g, while the discharge platform of power-type fluorographene is equal or greater than 2.85V, the specific capacity is more than 750mAh/g.
