Sequential doping of nitrogen and oxygen in single-walled carbon nanohorns for use as supercapacitor electrodes

Authors
Wee, Jae-HyungKim, Yoong AhmYang, Cheol-Min
Issue Date
2021-01
Publisher
ELSEVIER
Citation
MICROPOROUS AND MESOPOROUS MATERIALS, v.310
Abstract
To store more energy in limited spaces, the volumetric performance of energy storage devices used in electric vehicles and portable electronics has attracted more research attention than their gravimetric performance. Herein, we describe the preparation of N/O co-doped single-walled carbon nanohorns (SWCNH) using chemical vapor deposition with pyridine followed by acid treatment to obtain a supercapacitor electrode material with high specific volumetric capacitance. The synthesized N/O co-doped SWCNH (N and O contents of 6.1 and 9.1 at %, respectively) electrode had a higher bulk density (1.05 g cm(3)) than that of the pristine SWCNH electrode (0.86 g cm(-3)). Moreover, the N/O co-doped SWCNH supercapacitor electrode exhibited drastically increased specific volumetric, gravimetric, and areal capacitances (123 F cm(-3), 117 F g(-1), and 91.4 mu F cm(-2), respectively) in 1 M H2SO4 electrolyte, compared with those of a pristine SWCNH electrode (36 F cm(-3), 42 F g(-1), and 11.4 mu F cm(-2), respectively). The superior electrochemical performances are associated with enhanced pseudocapacitive contribution and high bulk density of electrode upon N/O co-doping. The simple method described herein for producing SWCNH electrodes with high bulk density and high specific volumetric capacitance should contribute to the development of supercapacitors with high volumetric performance.
Keywords
CHEMICAL-VAPOR-DEPOSITION; DOPED POROUS CARBON; CAPACITANCE; GRAPHENE; SITES; CHEMICAL-VAPOR-DEPOSITION; DOPED POROUS CARBON; CAPACITANCE; GRAPHENE; SITES; Single-walled carbon nanohorn; Nitrogen doping; Oxygen doping; Electrode bulk density; Supercapacitor; Specific volumetric capacitance
ISSN
1387-1811
URI
https://pubs.kist.re.kr/handle/201004/117596
DOI
10.1016/j.micromeso.2020.110595
Appears in Collections:
KIST Article > 2021
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE