Design and preparation of highly structure-controllable mesoporous carbons at the molecular level and their application as electrode materials for supercapacitors

doi:10.1039/c5ta05947j

	Design and preparation of highly structure-controllable mesoporous carbons at the molecular level and their application as electrode materials for supercapacitors
	Yan, Kun 1; Kong, Ling-Bin 1,2; Dai, Yan-Hua 1; Shi, Ming 1; Shen, Kui-Wen 1; Hu, Bing 1; Luo, Yong-Chun 2; Kang, Long 2
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2015
卷号	3 期号:45 页码:22781-22793
关键词	Acrylic monomers Atom transfer radical polymerization Block copolymers Capacitance Carbon Carbonization Current density Electrodes Electrolytes Esters Free radical reactions Lithography Microphase separation Molecular weight Polydispersity Pore structure Potassium hydroxide Supercapacitor
ISSN号	2050-7488
DOI	10.1039/c5ta05947j
英文摘要	Highly structure-controllable mesoporous carbons (HSCMCs) were prepared through a simple carbonization procedure using well-controlled diblock copolymer precursors. We chose polyacrylonitrile-block-polymethylmethacrylate diblock copolymers as precursors, containing a source of carbon, i.e., polyacrylonitrile (PAN), and a sacrificial block, i.e., poly methyl methacrylate (PMMA). PAN-b- PMMA diblock copolymers were synthesized successfully by atom transfer radical polymerization (ATRP) in DMF at 90 degrees C with well-controlled molecular weight and narrow polydispersity. The as-synthesized PAN-b-PMMA diblock copolymers experienced a microphase-separation process to form a self-assembled nanostructure at 250 degrees C and then converted to a mesoporous carbon phase after carbonation at 800 degrees C. The mesoporous sizes of HSCMCs were increased with the increment of molecular weight of the sacrificial block (PMMA). In addition, the HSCMCs exhibited well-controlled mesoporous sizes of 5.96-17.42 nm and high specific surface areas of 427.6-213.1 m(2) g(-1). The well-controlled pore structure in such materials provided huge potential application as electrode materials for supercapacitors. In particular, HSCMC-5 with an optimal mesoporous size of 13.68 nm could achieve the highest specific capacitance of 254 F g(-1) at a current density of 0.5 A g(-1) in 2 M KOH aqueous electrolyte. Furthermore, it also possessed an excellent rate capability of 78% capacitance retention as the current density increased from 0.5 A g(-1) to 5 A g(-1) and a superior cycling performance of 96% capacitance retention after 10 000 cycles at a current density of 2 A g(-1). Besides, by precisely controlling the pore structure of HSCMCs, the mechanism of electric double layer capacitors could be investigated systematically.
资助项目	National Nature Science Foundation of China[51362018Y][21163010]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000365011400031
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/36050]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Kong, Ling-Bin
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Yan, Kun,Kong, Ling-Bin,Dai, Yan-Hua,et al. Design and preparation of highly structure-controllable mesoporous carbons at the molecular level and their application as electrode materials for supercapacitors[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015,3(45):22781-22793.
APA	Yan, Kun.,Kong, Ling-Bin.,Dai, Yan-Hua.,Shi, Ming.,Shen, Kui-Wen.,...&Kang, Long.(2015).Design and preparation of highly structure-controllable mesoporous carbons at the molecular level and their application as electrode materials for supercapacitors.JOURNAL OF MATERIALS CHEMISTRY A,3(45),22781-22793.
MLA	Yan, Kun,et al."Design and preparation of highly structure-controllable mesoporous carbons at the molecular level and their application as electrode materials for supercapacitors".JOURNAL OF MATERIALS CHEMISTRY A 3.45(2015):22781-22793.