Solution Processable Holey Graphene Oxide and Its Derived Macrostructures for High-Performance Supercapacitors.
Solution Processable Holey Graphene Oxide and Its Derived Macrostructures for High-Performance Supercapacitors.
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DOI：
10.1021/acs.nanolett.5b01212
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发表时间：
2015-06
期刊：
影响因子：
10.8
通讯作者：
Yuxi Xu;Chih-Yen Chen;Zipeng Zhao;Zhaoyang Lin;Chai-Fen Lee;Xu Xu-Xu;Chen Wang;Yu Huang;M. I. Shaki
中科院分区：
文献类型：
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作者：
Yuxi Xu;Chih-Yen Chen;Zipeng Zhao;Zhaoyang Lin;Chai-Fen Lee;Xu Xu-Xu;Chen Wang;Yu Huang;M. I. Shaki
可溶液加工石墨烯及其具有高比表面积和设计孔隙率的块状材料的可扩展制备对于许多实际应用至关重要。在此，我们报告了一种可扩展的方法，通过一种方便的温和缺陷蚀刻反应，生产具有丰富平面内纳米孔的多孔氧化石墨烯的水分散体，并证明了多孔氧化石墨烯可以作为一种多功能的构建块，用于组装宏观结构，包括具有三维分层孔隙的多孔石墨烯水凝胶和具有致密但多孔的层状结构的多孔石墨烯纸。与非多孔石墨烯相比，这些多孔石墨烯宏观结构具有显著提高的比表面积和离子扩散速率，可以直接用作无粘合剂的超级电容器电极，具有283 F/g和234 F/cm(3)的超高比电容，出色的倍率能力和优越的循环稳定性。我们的研究定义了一种可扩展的途径来解决可加工的多孔石墨烯材料，并将极大地影响石墨烯在不同技术领域的应用。
Scalable preparation of solution processable graphene and its bulk materials with high specific surface areas and designed porosities is essential for many practical applications. Herein, we report a scalable approach to produce aqueous dispersions of holey graphene oxide with abundant in-plane nanopores via a convenient mild defect-etching reaction and demonstrate that the holey graphene oxide can function as a versatile building block for the assembly of macrostructures including holey graphene hydrogels with a three-dimensional hierarchical porosity and holey graphene papers with a compact but porous layered structure. These holey graphene macrostructures exhibit significantly improved specific surface area and ion diffusion rate compared to the nonholey counterparts and can be directly used as binder-free supercapacitor electrodes with ultrahigh specific capacitances of 283 F/g and 234 F/cm(3), excellent rate capabilities, and superior cycling stabilities. Our study defines a scalable pathway to solution processable holey graphene materials and will greatly impact the applications of graphene in diverse technological areas.