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

Title
Sequential doping of nitrogen and oxygen in single-walled carbon nanohorns for use as supercapacitor electrodes
Authors
양철민위재형Yoong Ahm Kim
Keywords
Single-walled carbon nanohorn; Nitrogen doping; Oxygen doping; Electrode bulk density; Supercapacitor; Specific volumetric capacitance
Issue Date
2021-01
Publisher
Microporous and mesoporous materials
Citation
VOL 310, 110595
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 μF 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 μF 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.
URI
http://pubs.kist.re.kr/handle/201004/71933
ISSN
1387-1811
Appears in Collections:
KIST Publication > Article
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