Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766902 | Electrochimica Acta | 2017 | 30 Pages |
Abstract
Nanocomposites of graphene and N-doped porous carbon (HPNCs/rGO-800) are prepared via facile carbonization of Zn-metal-organic frameworks (ZIF-8) by controlling appropriate temperature. In comparison with the single N-doped porous carbon (HPNCs-800) which are made from the pure ZIF-8, HPNCs/rGO-800 reduce the agglomeration of ZIF-8 and promote electrical conductivity. In this work, HPNCs/rGO-800 materials exhibit excellent electrochemical performances with a high specific capacitance of 245 F gâ1 in 6 M KOH electrolyte at a current density of 1 A gâ1. Moreover, HPNCs/rGO-800//HPNCs/rGO-800 symmetric supercapacitor reaches a superior energy density of 18.0 Wh kgâ1 at a power density of 475 W kgâ1 in the wide voltage region of 0-1.8 V, and a superb cycle stability (90% capacitance retention after 10,000 cycles). Such outstanding electrochemical behavior shows that the device is a promising practical energy-storage facility.
Related Topics
Physical Sciences and Engineering
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Authors
Lijun Xin, Qi Liu, Jingyuan Liu, Rongrong Chen, Rumin Li, Zhanshuang Li, Jun Wang,