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Three-dimensional hierarchical nitrogen-doped arch and hollow nanocarbons: morphological influences on supercapacitor applications

Title
Three-dimensional hierarchical nitrogen-doped arch and hollow nanocarbons: morphological influences on supercapacitor applications
Authors
Ramakrishnan, P[Ramakrishnan, Prakash]Park, SG[Park, Soo-Gil]Shanmugam, S[Shanmugam, Sangaraju]
DGIST Authors
Shanmugam, S[Shanmugam, Sangaraju]
Issue Date
2015
Citation
Journal of Materials Chemistry A, 3(31), 16242-16250
Type
Article
Article Type
Article
Keywords
ArchesCapacitorsCarbon NanostructuresCarbonizationCarbonization ProcessCoaxial ElectrospinningDoping (Additives)ElectrodesHigh Surface AreaNano-StructuresNitrogenSpecific CapacitanceSupercapacitor ApplicationThree Electrode-SystemTwo-Electrode Systems
ISSN
2050-7488
Abstract
We report nitrogen (N) doped nanocarbons with two different morphologies, arch and hollow structure, for supercapacitor (SC) application. A simple co-axial electrospinning approach and subsequent leaching and carbonization processes are employed to fabricate N-doped carbon nanostructures. The fabricated N-doped arch and hollow nanocarbons exhibit high N-contents of 9.02 and 8.73 wt%, high surface areas of 619 and 557 m2 g-1, and total pore volumes of 0.6589 and 0.5681 cm3 g-1, respectively. The N-doped arch and hollow nanocarbons exhibit the maximum specific capacitances (Csp) of 417 and 371 F g-1 at 2 mV s-1 in a three-electrode system and Csp values of 230 and 212 F g-1 at 2 mV s-1 for a two-electrode system, respectively, in 1 M H2SO4 solution. The maximum energy densities of 8.4 and 7.5 W h kg-1 are obtained for N-doped arch and hollow nanocarbons, respectively. Further, these novel carbon nanostructures also deliver good cycle stabilities of 98% for 5000 cycles at a current density of 1 A g-1. Such outstanding SC electro-sorption ability is due to the high micro-texture and high N-content characteristics of carbon nanostructures. © The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/2359
DOI
10.1039/c5ta03384e
Publisher
Royal Society of Chemistry
Related Researcher
Files:
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Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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