High-yield scalable graphene nanosheet production from compressed graphite using electrochemical exfoliation.

High-yield scalable graphene nanosheet production from compressed graphite using electrochemical exfoliation.
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使用电化学去角质从压缩石墨产生高收益的石墨烯纳米片。

DOI:
10.1038/s41598-018-32741-3
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发表时间:
2018-09-28
期刊:
影响因子:
4.6
通讯作者:
Green MJ
Green MJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Achee TC;Sun W;Hope JT;Quitzau SG;Sweeney CB;Shah SA;Habib T;Green MJ

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电化学剥离是用于从石墨生产石墨烯的有前景的本体方法;在该方法中,施加的电压驱动离子物质嵌入石墨中,在那里它们形成膨胀并剥离单个石墨烯片的气态物质。然而,许多障碍阻碍了这种方法成为可行的生产路线;随着该方法的进展,石墨电极的分解是主要困难。在这里,我们表明,如果石墨粉末包含和压缩在一个可渗透和可膨胀的包容系统,石墨粉末可以连续插入,膨胀和剥离,以产生石墨烯。我们的数据表明,在所生产的石墨烯中,产率高(65%)且横向尺寸非常大(>30 μm)。我们还表明,这一过程是可扩展的,石墨烯的产率仅取决于反应器的几何形状,石墨压缩,和电解质运输。
Electrochemical exfoliation is a promising bulk method for producing graphene from graphite; in this method, an applied voltage drives ionic species to intercalate into graphite where they form gaseous species that expand and exfoliate individual graphene sheets. However, a number of obstacles have prevented this approach from becoming a feasible production route; the disintegration of the graphite electrode as the method progresses is the chief difficulty. Here we show that if graphite powders are contained and compressed within a permeable and expandable containment system, the graphite powders can be continuously intercalated, expanded, and exfoliated to produce graphene. Our data indicate both high yield (65%) and extraordinarily large lateral size (>30 μm) in the as-produced graphene. We also show that this process is scalable and that graphene yield efficiency depends solely on reactor geometry, graphite compression, and electrolyte transport.
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