Issue 45, 2016, Issue in Progress

Carbon quantum dots/Ni–Al layered double hydroxide composite for high-performance supercapacitors

Abstract

Ultrathin nanoplate-like carbon quantum dots (CQDs)/Ni–Al layered double hydroxide (LDH) composite has been fabricated by a facile one-step solvothermal method. The obtained porous CQDs/NiAl-LDH composite displayed an enlarged specific surface and nanoscale size. As supercapacitor electrode material, the composite exhibited remarkable electrochemical performance with superior specific capacitance of 1794 F g−1 (at 2 A g−1), high rate capability of 967 F g−1 (at 20 A g−1) and excellent cycle performance (about 93% retention over 1500 cycles). The enhanced supercapacitor performance of CQDs/NiAl-LDH electrode should be attributed to the synergistic effect between NiAl-LDH nanosheets and CQDs.

Graphical abstract: Carbon quantum dots/Ni–Al layered double hydroxide composite for high-performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2016
Accepted
07 Apr 2016
First published
11 Apr 2016

RSC Adv., 2016,6, 39317-39322

Carbon quantum dots/Ni–Al layered double hydroxide composite for high-performance supercapacitors

Y. Wei, X. Zhang, X. Wu, D. Tang, K. Cai and Q. Zhang, RSC Adv., 2016, 6, 39317 DOI: 10.1039/C6RA02730J

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