Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules

doi:10.1039/c5ra15594k

	Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules
	Ran, Fen 1,2; Zhang, Xuanxuan 2; Liu, Yuansen 3; Shen, Kuiwen 2; Niu, Xiaoqin 1; Tan, Yongtao 2; Kong, Lingbin 2; Kang, Long 2; Xu, Changan 3; Chen, Shaowei 1
刊名	RSC ADVANCES
	2015
卷号	5 期号:106 页码:87077-87083
关键词	Capacitance Carbon Crosslinking Electrodes Electrolytes Emulsification Emulsion polymerization Free radical reactions High resolution transmission electron microscopy Pore structure Potassium hydroxide Scanning electron microscopy Styrene Supercapacitor
DOI	10.1039/c5ra15594k
英文摘要	Remarkable supercapacitor electrodes with a high specific supercapacitance and a super long cycle life were achieved by using hierarchical porous hollow carbon microcapsules (HPHCMs) as active materials. HPHCMs were prepared by a facile chemical route based on pyrolysis of a soft sacrificial template involving a non-crosslinked core of poly(styrene-r-methylacrylic acid) and a crosslinked shell of poly(styrene-r-divinylbenzene-r-methylacrylic acid), which were synthesized by using traditional radical polymerization and emulsion polymerization. The results of scanning electron microscopy, transmission electron microscopy and Brunauer-Emmett-Teller characterizations revealed that HPHCM possessed the desired pore structure with apparent macro-/meso- and micropores, which not only provided a continuous electron-transfer pathway to ensure good electrical contact, but also facilitated ion transport by shortening diffusion pathways. As electrode materials for supercapacitor, a high specific capacitance of 278.0 F g(-1) was obtained at the current density of 5 mA cm(-2). Importantly, after 5000 potential cycles in 2 M KOH electrolyte at the discharge current density of 20 mA cm(-2), the capacitance actually increased from 125 to 160 F g(-1) and then remained 151 F g(-1), corresponding to a capacitance retention of 120%, likely due to electrochemical self-activation.
资助项目	University Scientific Research Project of Gansu Province[2014B-025]
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000363233500028
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34217]
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	Ran, Fen
作者单位	1.Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 3.State Ocean Adm, Inst Oceanog 3, Engn Res Ctr Marine Biol Resource Comprehens Util, Xiamen 361005, Peoples R China
推荐引用方式 GB/T 7714	Ran, Fen,Zhang, Xuanxuan,Liu, Yuansen,et al. Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules[J]. RSC ADVANCES,2015,5(106):87077-87083.
APA	Ran, Fen.,Zhang, Xuanxuan.,Liu, Yuansen.,Shen, Kuiwen.,Niu, Xiaoqin.,...&Chen, Shaowei.(2015).Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules.RSC ADVANCES,5(106),87077-87083.
MLA	Ran, Fen,et al."Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules".RSC ADVANCES 5.106(2015):87077-87083.