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Precursor-Controlled and Template-Free Synthesis of Nitrogen-Doped Carbon Nanoparticles for Supercapacitors
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Precursor-Controlled and Template-Free Synthesis of Nitrogen-Doped Carbon Nanoparticles for Supercapacitors
Posted:2016-03-18 17:24    Column:2015
L.-P. Lv, Z.-S. Wu, L. Chen, H. Lu, Y.-R. Zheng, T. Weidner, X. Feng, K. Landfester, D. Crespy*,
RSC Advances 2015, 5 (62): 50063-50069. 
DOI:10.1039/c5ra06697b  [PDF]

Abstract
We describe the synthesis of hierarchical porous nitrogen-doped carbon nanoparticles with high specific surface area and specific capacitance for supercapacitors. Octapyrrolylnaphthalene (OPN) with eight substituent pyrrolyl groups is used as a reaction precursor and the oxidative product, assigned as POPN, is synthesized in miniemulsion droplets. Further carbonization of POPN at 600℃ (POPN600) and 800℃(POPN800) provides particles with hierarchical porosity, well-defined nanoparticle structure, and high specific surface area. The obtained nitrogen-doped carbon particles POPN800 exhibit a specific capacitance of 156 F g-1 at the scan rate of 2 mV s-1 and 80 F g-1 when the scan rate increases to 100 mV s-1. The high specific capacitance and excellent rate capability can be attributed to the controlled structure of the nanoparticles, hierarchical micro- and mesoporosity, high surface area(365 m2 g-1), and rich nitrogen-doping. The present method allows therefore for the synthesis of nitrogen-doped carbon materials for supercapacitors in an easy one-pot and template-free miniemulsion procedure followed by carbonization.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn
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