Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules | |
Ran, Fen1,2; Zhang, Xuanxuan2; Liu, Yuansen3; Shen, Kuiwen2; Niu, Xiaoqin1; Tan, Yongtao2; Kong, Lingbin2; Kang, Long2; Xu, Changan3; Chen, Shaowei1 | |
刊名 | RSC ADVANCES
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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. |
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