Tailoring Microstructure of Graphene-Based Membrane by Controlled Removal of Trapped Water Inspired by the Phase Diagram

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	Tailoring Microstructure of Graphene-Based Membrane by Controlled Removal of Trapped Water Inspired by the Phase Diagram
	W. Lv; Z. J. Li; G. M. Zhou; J. J. Shao; D. B. Kong; X. Y. Zheng; B. H. Li; F. Li; F. Y. Kang; Q. H. Yang
	2014
发表期刊	Advanced Functional Materials
ISSN	1616-301X
卷号	24 期号:22 页码:3456-3463
摘要	As an important form of graphene assembled in macroscale, the graphene-based membrane attracts much attention due to its easy manipulation and various potential applications. However, tailoring the microstructure of these membranes is hard to achieve and the surface utilization of graphene layers is low. By analyzing the drying process for the wet graphene oxide membrane (GOM), it is found that the trapped water in freshly formed GOM actually provides potential forces to tune its microstructure. According to the phase diagram of pure water, with a reduced pressure, the trapped water boils seriously and then transforms into ice crystal instantaneously around the triple point. This sudden phase change across the triple point provides strong forces to change and fix the microstructure of GOM. In this study, the ordinary evaporation drying process for the wet GOM is replaced with a two-stage drying process and the tightly layered structure of graphene membrane is turned into an open and grade structure. The obtained membrane shows high surface utilization. Thus, after reduction, the membrane possesses high adsorption capability towards various molecules, especially for heavy oil and lithium polysulfide products in the cathode of Li-S battery. Furthermore, the membrane shows high rate performance as the electrodes for supercapacitors.
部门归属	[lv, wei ; li, zhengjie ; kang, feiyu ; yang, quan-hong] tsinghua univ, engn lab functionalized carbon mat, grad sch shenzhen, shenzhen 518055, peoples r china. [li, zhengjie ; shao, jiao-jing ; kong, debin ; zheng, xiaoyu ; yang, quan-hong] tianjin univ, sch chem engn & technol, tianjin 300072, peoples r china. [zhou, guangmin ; li, feng] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; lv, w (reprint author), tsinghua univ, engn lab functionalized carbon mat, grad sch shenzhen, shenzhen 518055, peoples r china. ; yang.quanhong@mail.sz.tsinghua.edu.cn
关键词	Graphene-based Membranes Graded Structures Triple Point Adsorption Supercapacitors High-performance Graphite Oxide Liquid/air Interface Paper Electrodes Energy-storage Supercapacitors Ultracapacitors Exfoliation Temperature Batteries
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73335
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Lv,Z. J. Li,G. M. Zhou,et al. Tailoring Microstructure of Graphene-Based Membrane by Controlled Removal of Trapped Water Inspired by the Phase Diagram[J]. Advanced Functional Materials,2014,24(22):3456-3463.
APA	W. Lv.,Z. J. Li.,G. M. Zhou.,J. J. Shao.,D. B. Kong.,...&Q. H. Yang.(2014).Tailoring Microstructure of Graphene-Based Membrane by Controlled Removal of Trapped Water Inspired by the Phase Diagram.Advanced Functional Materials,24(22),3456-3463.
MLA	W. Lv,et al."Tailoring Microstructure of Graphene-Based Membrane by Controlled Removal of Trapped Water Inspired by the Phase Diagram".Advanced Functional Materials 24.22(2014):3456-3463.