期刊
ELECTROCHIMICA ACTA
卷 205, 期 -, 页码 132-141出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.114
关键词
Nitrogen-containing ultramicroporous; carbon nanosphere; Hexamethylenetetramine; Polymer nanoparticle; Supercapacitor electrode
资金
- National Natural Science Foundation of China [21207099, 21273162, 21473122, 21501135]
- Science and Technology of Shanghai Municipality, China [14DZ2261100]
- Fundamental Research Funds for the Central Universities
- Large Equipment Test Foundation of Tongji University
In this paper, we report a facile and novel synthesis of nitrogen-containing ultramicroporous carbon nanospheres (N-UCNs) for high performance supercapacitor electrodes. Phloroglucinol and terephthalaldehyde are polymerized to obtain polymer nanoparticles with a mean diameter of similar to 15 nm. Hexamethylenetetramine (HMTA) is utilized to substitute ammonia and formaldehyde to polymerize with resorcinol on the surfaces of the polymer colloids for the fabrication of carbon spheres under the Stober condition. The introduction of phloroglucinol/terephthalaldehyde brings regular ultramicroporous (0.58 nm) to the typical N-UCNs. Besides, the polymerization of resorcinol and HMTA on the surfaces of polymer nanoparticles reduces the diameter of carbon nanospheres from submicrometer sizes to nanoscaled sizes (similar to 36 nm). Furthermore, the NH4+ released from the hydrolysis of HMTA also acts a source of nitrogen in the carbon framework (1.21 at.%), which can improve the surface properties and electric conductivity of N-UCNs. The typical N-UCNs (N-UCN4.50) with spherical geometry, high surface area (1439 m(2) g(-1)), regular ultramicropores and nitrogen functional groups shows excellent electrochemical performance such as high specific capacitance (269 F g(-1) at 1.0 A g(-1)), long-term cycle stability (90.3% retention after 10000 charge/discharge cycles) in 6 M KOH aqueous electrolyte. This finding provides new opportunities for well-designed carbon nanospheres to achieve advanced supercapacitor electrodes. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据