Abstract
We discovered an organic weak acid, 3,4,9,10-perylene tetracarboxylic acid (PTCA), confined on the electrode surface, revealing a reversible and ultrafast protonation/deprotonation non-Faradaic process but exhibiting analogous voltammetric peaks (capacitive peaks). A further synthesized PTCA-graphene supra molecular nanocomplex discloses a wide voltage window (1.2 V) and ultrahigh specific capacitance up to 143 F g(-1) at an ultrafast charge-discharge density of 1000 A g(-1) (at least 1 order of magnitude faster than present speeds). The capacitance retention maintained at 73% after 5000 cycles. This unique capacitive, voltammetric behavior suggests a new type of charge-storage modes, which-may offer a way for overcoming the present difficulties of supercapacitors.
Original language | English |
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Journal | Journal of the American Chemical Society |
Volume | 138 |
Issue number | 5 |
Pages (from-to) | 1490-1493 |
Number of pages | 4 |
ISSN | 0002-7863 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |