Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage

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	Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage
	C. M. Chen; Q. Zhang; X. C. Zhao; B. S. Zhang; Q. Q. Kong; M. G. Yang; Q. H. Yang; M. Z. Wang; Y. G. Yang; R. Schlogl; D. S. Su
	2012
发表期刊	Journal of Materials Chemistry
ISSN	0959-9428
卷号	22 期号:28 页码:14076-14084
摘要	Graphene with mediated surface properties and three-dimensional hierarchical architectures show unexpected performance in energy conversion and storage. To achieve advanced graphene electrode supercapacitors, manipulating the graphene building-blocks into hierarchical nanostructured carbon materials with large electrical double layer capacitance and pseudo-capacitance is a key issue. Here, it is shown that the hierarchically aminated graphitic honeycombs (AGHs) with large surface area for electrical double layer capacitance, tunable surface chemistry for pseudo-capacitance, mediated 3D macropores for ion buffering, and low-resistant pathways for ion diffusion are fabricated for electrochemical capacitive energy storage application through a facile high vacuum promoted thermal expansion and subsequent amination process. In the initial stage of amination (similar to 200 degrees C), NH3 reacts with carboxylic acid species to form mainly intermediate amides and amines through nucleophilic substitution. As the temperature increases, the intramolecular dehydration and decarbonylation will take place to generate thermally more stable heterocyclic aromatic moieties such as pyridine, pyrrole, and quaternary type N sites. The AGH exhibits a promising prospect in supercapacitor electrodes with high capacitance (e.g. maximum gravimetric capacitance 207 F g(-1) and specific capacitance 0.84 F m(-2) at a scan rate of 3 mV s(-1)) and extraordinary stability (e.g. 97.8% of capacitance retention after 3000 cycles, and 47.8% of capacitance maintaining at a high scan rate of 500 mV s(-1) comparing with that at 3 mV s(-1)). This provides a novel structure platform for catalysis, separation, and drug delivery, which require fast mass transfer through mesopores, reactant reservoirs, and tunable surface chemistry.
部门归属	[chen, cheng-meng; zhang, qiang; zhao, xiao-chen; zhang, bingsen; schloegl, robert; su, dang sheng] max planck gesell, dept inorgan chem, fritz haber inst, d-14195 berlin, germany. [chen, cheng-meng; kong, qing-qiang; yang, mang-guo; yang, quan-hong; wang, mao-zhang; yang, yong-gang] chinese acad sci, key lab carbon mat, inst coal chem, taiyuan 030001, peoples r china. [zhang, qiang] tsinghua univ, beijing key lab green chem react engn & technol, dept chem engn, beijing 100084, peoples r china. [zhang, bingsen; su, dang sheng] chinese acad sci, catalysis & mat div, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [zhao, xiao-chen] chinese acad sci, state key lab catalysis, dalian inst chem phys, dalian 116023, peoples r china. [zhao, xiao-chen] chinese acad sci, grad univ, beijing 100049, peoples r china.;su, ds (reprint author), max planck gesell, dept inorgan chem, fritz haber inst, faradayweg 4-6, d-14195 berlin, germany.;dangsheng@fhi-berlin.mpg.de
关键词	Chemical-vapor-deposition Layered Double Hydroxides Lithium-ion Batteries Graphite Oxide Supercapacitor Application Surface-chemistry Activated Carbon Doped Graphene Performance Composites
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59900
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. M. Chen,Q. Zhang,X. C. Zhao,et al. Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage[J]. Journal of Materials Chemistry,2012,22(28):14076-14084.
APA	C. M. Chen.,Q. Zhang.,X. C. Zhao.,B. S. Zhang.,Q. Q. Kong.,...&D. S. Su.(2012).Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage.Journal of Materials Chemistry,22(28),14076-14084.
MLA	C. M. Chen,et al."Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage".Journal of Materials Chemistry 22.28(2012):14076-14084.