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Oxidating Fresh Porous Graphene Networks toward Ultra-Large Graphene Oxide with Electrical Conductivity | |
2022-08-05 | |
发表期刊 | ADVANCED FUNCTIONAL MATERIALS (IF:18.5[JCR-2023],19.6[5-Year]) |
ISSN | 1616-301X |
卷号 | 32期号:42页码:2202697 |
发表状态 | 已发表 |
DOI | 10.1002/adfm.202202697 |
摘要 | Ultra-large graphene oxide (ULGO) is one of the most important graphene derivates because of its processability in constructing various macrostruc-tures with unique properties. However, existing oxidation–exfoliation tech-nologies are limited in the available size range, structure controllability, and preparation efficiency of ULGO by the slow oxidant diffusion among graphite interlayers. Herein, a highly efficient strategy to fabricate ULGO featuring the oxidation of porous graphene networks freshly derived from electrochemical delamination, which highlights the significance of not only creation but also keeping of the fast diffusion channels for oxidant, is proposed. Consuming only 40 min and ultralow oxidant dosage (1 wt equiv.), this economical oxida-tion realizes high-yield preparation (≈99.5%) of ULGO with record-large average size (188.3 μm) and unusual low-defect structure. Unlike previous reports, free-standing films assembled from the as-prepared ULGO exhibit an unexpected electrical conductivity (305.3 S m−1) alongside record-breaking mechanical properties (21.2 GPa in Young’s modulus, 392.1 MPa in tensile strength). Also, the advantage of ULGO in constructing commercially desir-able thick graphene films with high thermal conductivity is demonstrated (≈100 μm, 1576.1±26.7 W m−1 K−1). This new strategy based on new findings in mechanism provides a highly efficient route to enlarge lateral size and expand physical properties of graphene oxide. |
关键词 | crystal structures efficient oxidations large sizes mechanical properties thermal conductivities |
学科门类 | 工学 |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | 正在获取...
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文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/346053 |
专题 | 个人在本单位外知识产出 |
共同第一作者 | Xiaoming Xie |
通讯作者 | Peng He; Guqiao Ding |
作者单位 | 1.State Key Laboratory of Functional Materials for InformaticsCenter for Excellence in Superconducting ElectronicsShanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences865 Changning Road, Shanghai 200050, P. R. China 2.College of Materials Science and Opto-Electronic TechnologyUniversity of Chinese Academy of SciencesBeijing 100049, P. R. China |
推荐引用方式 GB/T 7714 | Penglei Zhang,Peng He,Yifeng Zhao,et al. Oxidating Fresh Porous Graphene Networks toward Ultra-Large Graphene Oxide with Electrical Conductivity[J]. ADVANCED FUNCTIONAL MATERIALS,2022,32(42):2202697. |
APA | Penglei Zhang.,Peng He.,Yifeng Zhao.,Siwei Yang.,Qingkai Yu.,...&Guqiao Ding.(2022).Oxidating Fresh Porous Graphene Networks toward Ultra-Large Graphene Oxide with Electrical Conductivity.ADVANCED FUNCTIONAL MATERIALS,32(42),2202697. |
MLA | Penglei Zhang,et al."Oxidating Fresh Porous Graphene Networks toward Ultra-Large Graphene Oxide with Electrical Conductivity".ADVANCED FUNCTIONAL MATERIALS 32.42(2022):2202697. |
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