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B/N co-doped carbon nanosphere frameworks as high-performance electrodes for supercapacitors
journal contribution
posted on 2018-05-07, 00:00 authored by J Hao, J Wang, Alex QinAlex Qin, Dan LiuDan Liu, Y Li, Weiwei LeiWeiwei LeiEnergy storage devices capable of high power outputs currently attract much research interest. An example is supercapacitors, which show both high capacitance and sustained cycling ability. However, their electrodes, especially those based on carbon materials, often suffer from either low capacitance at high current density or poor durability after many cycles. Here we report a novel boron/nitrogen co-doped carbon nanosphere (B/N-CNS) framework that is simply prepared by annealing boron oxide, ammonium chloride, and glucose. The resulting B/N-CNS framework exhibits an ultra-high specific capacitance of 423 F g-1at 0.2 A g-1and excellent rate capability of up to 125 F g-1at 50 A g-1. The improved performance is ascribed to its interconnected framework of nanospheres and B/N co-doping. In addition, unlike most carbon materials, this framework displays exceptional stability, showing no capacitance fading at 10 A g-1after 30000 cycles. Furthermore, an all-solid sandwich-structured symmetric supercapacitor with B/N-CNS framework electrodes can power a light emitting diode, demonstrating its practicability as a fully integrated energy storage device. The facile synthesis strategy and impressive capacitive performances of B/N-CNS framework make this material significantly promising in the fabrication of novel electrode materials for energy storage applications.
History
Journal
Journal of materials chemistry AVolume
6Issue
17Pagination
8053 - 8058Publisher
Royal Society of ChemistryLocation
Cambridge, Eng.Publisher DOI
ISSN
2050-7488eISSN
2050-7496Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, The Royal Society of ChemistryUsage metrics
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No categories selectedKeywords
supercapacitorssustained cycling abilityelectrodescarbon materialshigh current densitycarbon nanosphere (B\/N–CNS)boron oxideammonium chlorideglucoseScience & TechnologyPhysical SciencesTechnologyChemistry, PhysicalEnergy & FuelsMaterials Science, MultidisciplinaryChemistryMaterials SciencePOROUS CARBONNITRIDE NANOSHEETSGRAPHENEBORONNITROGENSPHERES
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