Highly porous graphitic carbon and Ni 2 P 2 O 7 for a high performance aqueous hybrid supercapacitor

Citation data:

J. Mater. Chem. A, ISSN: 2050-7488, Vol: 3, Issue: 43, Page: 21553-21561

Publication Year:
2015
Captures 2
Readers 2
Citations 18
Citation Indexes 18
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/17876
DOI:
10.1039/c5ta04737d
Author(s):
Senthilkumar, Baskar, Khan, Ziyauddin, Park, Seungyoung, Kim, Kyoungho, Ko, Hyunhyub, Kim, Youngsik
Publisher(s):
Royal Society of Chemistry (RSC), The Royal Society of Chemistry, ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY
Tags:
Chemistry, Energy, Materials Science, HIGH-ENERGY DENSITY, ELECTROCHEMICAL CAPACITORS, ASYMMETRIC SUPERCAPACITORS, NICKEL-HYDROXIDE, SOLID-STATE, CONTROLLED FABRICATION, ULTRAHIGH CAPACITANCE, ELECTRODE MATERIAL, FACILE SYNTHESIS, CATHODE MATERIAL
article description
An aqueous Na-ion based hybrid capacitor has been successfully developed by using highly porous graphitic carbon (HPGC) derived from waste writing paper and a new electrode material as a negative and positive electrode, respectively. HPGC was prepared via hydrothermal carbonization and subsequent KOH activation of waste writing paper which showed a highly porous stacked sheet-like morphology with an exceptionally high BET specific surface area (1254 m g). HPGC exhibited typical electrical double layer capacitor (EDLC) behavior with a high specific capacitance of 384 F g and good negative working potential (-1.0 V) in an aqueous electrolyte. On the other hand, NiPO was synthesized by a simple co-precipitation technique and tested as a cathode material which delivered a maximum specific capacitance of 1893 F g at 2 A g current density. The fabricated HPGCNiPO hybrid device displayed excellent cyclic stability up to 2000 cycles and delivered a maximum energy density of 65 W h kg at 800 W kg power density in a Na-ion based aqueous electrolyte.

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