Xizhi Wang, Xiaofei Zeng and Dapeng Cao
State Key Laboratory of Organic-Inorganic Composites, and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
#These authors contributed equally to this work
Currently, developing high performance supercapacitor material suitable for application in the areas, which require high energy density battery, is still a great challenge. Here, we use biomass poplar sawdust as precursors to prepare nitrogen-doped porous carbons (NPC) and the NPC/polyaniline (PANI) composites, and further explore its application in supercapacitor electrodes. By optimizing the carbonization temperature, we find the NPC-750 sample shows a highest specific capacitance of 362 F∙g-1 in 6 M KOH at 0.5 A∙g-1 among the four samples, due to its large specific surface area of 2149 m2·g-1, and suitable pore size distribution and high graphitization degree. Further investigations indicate that NPC/PANI composite exhibits a much higher specific capacitance of 312 F∙g-1 than 252 F∙g-1 of NPC at 5 A∙g-1, and a wider voltage range of 0-1.4 V than the one of 0-1V of NPC, as well as a much higher energy density of 15.45 Wh∙kg−1, which is 2.73 times of 5.66 Wh∙kg−1 of NPC. This work indicates that integrating porous carbon and PANI into a composite is a promising strategy for developing high performance supercapacitor electrode materials.
Article type:
Research Paper
Published online:
26 Mar 2018
DOI:
10.30919/es.180325
Volume:
1
Page:
55-63
Citation:
Engineered Science, 2018, 1, 55-63
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Description:
This article is cited by 47 publications.
This article is cited by 47 publications.
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