Graphene Vs Graphyne: Who Is Better Able To Dominate The Future?
- Apr 27, 2018 -

    With the 2010 Nobel Prize in physics awarded to the inventor of graphene - the two British physicists Andre and Constantine - a time when research circles set off an upsurge of research on graphene.

    Also in 2010, the researchers of the Institute of Chemistry of the Chinese Academy of Sciences deliberately invented and invented a new member of the carbon family: Graphyne, an exciting and major breakthrough.

    People can not help but wonder how Graphyne has developed so far. Graphene and graphite acetylene are better than others. Who can dominate the right to speak in the future?

    New member of the carbon family

    Synthesizing and separating new carbon allotropes of different dimensions has been the focus of research in the past twenty or thirty years. Scientists have discovered new carbon allotropes such as three-dimensional fullerenes, one-dimensional carbon nanotubes, and two-dimensional graphene. All these materials have become the frontier and hotspot of international academic research. Carbon materials can be widely used in lithium ion batteries, super capacitors, sensors, solar cells, catalytic carriers, and nano-microelectronic devices. Carbon has three kinds of sp3, sp2, and sp hybrid states. Through different hybrid states, various carbon allotropes can be formed, which arouses scientists' interest in researching new carbon allotropes. Carbon materials have excellent electrical, optical and optoelectronic properties and will become key materials for the next generation of new electronic and optoelectronic devices. At this time, our scientists made great efforts to witness for the first time in the world the birth of a new member of the carbon family - Graphyne.

    Straw or gold?

    In 2010, while cheering for the Nobel Prize in Physics for graphene, Chinese scientists first announced the birth of Graphyne, a new member of the carbon family.

    In 2010, researchers from the key laboratory of the Institute of Chemical Physics, Chinese Academy of Sciences used hexaalkynylbenzene to perform a coupling reaction under the action of a copper sheet, and succeeded in chemically synthesizing large-area carbon homologues on the copper surface. Allomorphs - Graphyne, which is the world's first large-scale preparation of graphene acetylene film. It is rich in carbon chemical bonds, large conjugation systems, wide surface spacing, excellent chemical stability, and is known as the most stable allotrope of synthetic diacetylenic carbons. Due to its special electronic structure and the excellent semiconductor performance similar to silicon, graphyne can be widely used in the fields of electronics, semiconductors and new energy sources.

    It has long been desirable to obtain new allotropes of carbon with sp-hybrid states, thereby obtaining excellent performance. Such a good thing, why foreigners can not do it, and our country scientists have come?

    Beautiful "accidental"

    By visiting Li Yuliang, a researcher at the Institute of Chemistry of the Chinese Academy of Sciences, we learned that the huge "accident" of graphyne is actually accumulated by the group's many years of experience.

    Li Yuliang's research group began researching from the molecular design of the source and gradually tried to synthesize fragments of some molecules. But only the quantitative change was not enough. Until one day unexpectedly inspiring, Li Yuliang's researcher thought that a chemical method might cause large areas of graphite acetylene to film, that is, synthesize graphite acetylene chemically on the copper surface. In this process the copper foil not only serves as a catalyst for the cross-coupling reaction, a growth substrate, but also provides a large planar substrate for the directional polymerization required for the growth of the graphyne film.

    They immediately proceeded to do a qualitative change, and for the first time succeeded in acquiring a new allotrope of large-area carbon-graphite acetylene films. The world was shocked!

    Chess rivals: Graphene vs Graphyne

    As an upstart of the carbon family, graphene has become synonymous with "magic material" since its inception. However, the appearance of graphyne has once again refreshed the heat of the new word “graphene”. Both players are opponents, so in the end who is better?

    Let's talk about the extraordinary place of graphene. Graphene is both the thinnest and toughest material, and its breaking strength is 200 times higher than that of the best steel. At the same time, it has good elasticity, and the stretching amplitude can reach 20% of its own size. It is the thinnest and most powerful material in nature today. The most promising application direction of graphene is to become a substitute for silicon, and to manufacture ultra-micro transistors for the production of future supercomputers. Replacing silicon with graphene will increase the speed of computer processors by hundreds of times. In addition, graphene is almost completely transparent, absorbing only 2.3% of light, making it ideally suited as a raw material for transparent electronic products such as transparent touch screens, light panels, and solar panels.

    Graphyne, a new all-carbon nanostructure material after fullerenes, carbon nanotubes, and graphene, has a rich carbon chemical bond, a large conjugation system, wide surface spacing, and excellent chemical stability. It is known as the most stable synthetic allotrope of diacetylenic carbon. Due to its special electronic structure and its excellent semiconductor performance similar to silicon, graphyne is expected to be widely used in electronics, semiconductors and new energy fields. Studies have shown that graphyne is a very ideal lithium storage material, and its unique structure is more conducive to the diffusion and transport of lithium ions in-plane and out-of-plane, thus giving it very good rate performance. Graphyne has been proved from practice. It is a very promising lithium storage energy material, and scientists also predict that it will have an extraordinary impact in the new energy field.

    From this point of view, in terms of performance and application prospects, graphyne's "superpower" is no less inferior to graphene. As a new material material for the early days of the scientific community, the performance of graphite acetylene from China is naturally not bad.

    Dalian Xinghai Technology Co., Ltd.