Journal
PHYSICS LETTERS A
Volume 380, Issue 41, Pages 3378-3383Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2016.07.067
Keywords
Quantum capacitance; Supercapacitors; Doped-CNT; OFT study
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Using DFT calculations, we study the structural parameters, electronic properties and quantum capacitance of N, B, and P-doped armchair carbon nanotubes (CNTs). Fermi level shifts towards conduction band and valence band in N- and B-doped CNTs, respectively. While in the case of P atom, despite having an extra valence electron than carbon, there is no shift in Fermi level. The results revealed from a symmetric capacitance enhancement in P-doped CNT and an asymmetric capacitance enhancement in B and N-doped CNTs. The greatest amount of quantum capacitance of N-doped (6, 6) CNT could be achieved at the concentration range of 0.1-0.15. (C) 2016 Elsevier B.V. All rights reserved.
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