Powder, Paper and Foam of Few-Layer Graphene Prepared in High Yield by Electrochemical Intercalation Exfoliation of Expanded Graphite
文献类型：期刊论文
| 作者 | Liu, LW (刘立伟) ; Li, WW (李伟伟); Chen, ML (陈明亮)
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| 刊名 | SMALL
 |
| 出版日期 | 2014 |
| 卷号 | 10期号:7页码:1421-1429 |
| 关键词 | few-layer graphene electrochemical intercalation exfoliation macroscopic structure high conductivity supercapacitor |
| 通讯作者 | Liu, LW (刘立伟) |
| 英文摘要 | A facile and high-yield approach to the preparation of few-layer graphene (FLG) by electrochemical intercalation exfoliation (EIE) of expanded graphite in sulfuric acid electrolyte is reported. Stage-1 H2SO4-graphite intercalation compound is used as a key intermediate in EIE to realize the efficient exfoliation. The yield of the FLG sheets (<7 layers) with large lateral sizes (tens of microns) is more than 75% relative to the total amount of starting expanded graphite. A low degree of oxygen functionalization existing in the prepared FLG flakes enables them to disperse effectively, which contributes to the film-forming characteristics of the FLG flakes. These electrochemically exfoliated FLG flakes are integrated into several kinds of macroscopic graphene structures. Flexible and freestanding graphene papers made of the FLG flakes retain excellent conductivity (approximate to 24 500 S m(-1)). Three-dimensional (3D) graphene foams with light weight are fabricated from the FLG flakes by the use of Ni foams as self-sacrifice templates. Furthermore, 3D graphene/Ni foams without any binders, which are used as supercapacitor electrodes in aqueous electrolyte, provide the specific capacitance of 113.2 F g(-1) at a current density of 0.5 A g(-1), retaining 90% capacitance after 1000 cycles. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000333708900026 |
| 公开日期 | 2015-02-03 |
| 源URL | [http://ir.sinano.ac.cn/handle/332007/1808]  |
| 专题 | 苏州纳米技术与纳米仿生研究所_纳米器件及相关材料研究部_刘立伟团队 |
| 通讯作者 | Liu, LW (刘立伟) |
| 推荐引用方式 GB/T 7714 | Liu, LW ,Li, WW ,Chen, ML . Powder, Paper and Foam of Few-Layer Graphene Prepared in High Yield by Electrochemical Intercalation Exfoliation of Expanded Graphite[J]. SMALL,2014,10(7):1421-1429. |
| APA | Liu, LW ,Li, WW ,&Chen, ML .(2014).Powder, Paper and Foam of Few-Layer Graphene Prepared in High Yield by Electrochemical Intercalation Exfoliation of Expanded Graphite.SMALL,10(7),1421-1429. |
| MLA | Liu, LW ,et al."Powder, Paper and Foam of Few-Layer Graphene Prepared in High Yield by Electrochemical Intercalation Exfoliation of Expanded Graphite".SMALL 10.7(2014):1421-1429. |
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