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Erschienen in: Journal of Materials Science: Materials in Electronics 6/2019

11.02.2019

A template-free synthesis of porous 3D honeycomb-like carbons for supercapacitor electrodes

verfasst von: Yuexin Liu, Sha Li, Yanzhong Wang, Jinlong Yang

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 6/2019

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Abstract

Highly porous 3D honeycomb-like carbons were synthesized by a template-free method. Herein, the low-cost coal tar pitch is used as a carbon source. NH4Cl is employed as a blowing agent to form 3D honeycomb-like carbons, and followed by KOH chemical activation to form porous structure. The as-prepared porous 3D honeycomb-like carbons possess a large specific surface area of 2881.7 m2 g− 1 with a total pore volume of 2.18 cm3 g− 1. The unique structure allows for exhibiting a high specific capacitance of 324 F g− 1 at a current density of 0.1 A g− 1 in the three-electrode system. Moreover, the assembled symmetric supercapacitors exhibit an energy density of 9.72 Wh kg− 1 at a power density of 250 W kg− 1 and 6.43 Wh kg− 1 at a power density of 5000 W kg− 1, and excellent cycle performance of 92.2% retention over 5000 cycles at 1 A g− 1.

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Metadaten
Titel
A template-free synthesis of porous 3D honeycomb-like carbons for supercapacitor electrodes
verfasst von
Yuexin Liu
Sha Li
Yanzhong Wang
Jinlong Yang
Publikationsdatum
11.02.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 6/2019
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-019-00869-1

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