File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

장지현

Jang, Ji-Hyun
Structures & Sustainable Energy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

A new approach to high-performance flexible supercapacitors: Mesoporous three-dimensional Ni-electrodes

Author(s)
Kim, Sun-IKang, Ji-HunKim, Sung-WookJang, Ji-Hyun
Issued Date
2017-09
DOI
10.1016/j.nanoen.2017.07.050
URI
https://scholarworks.unist.ac.kr/handle/201301/22591
Fulltext
http://www.sciencedirect.com/science/article/pii/S2211285517304639?via%3Dihub
Citation
NANO ENERGY, v.39, pp.639 - 646
Abstract
The demand for portable electronic devices is driving the development of flexible supercapacitor, while current devices still need to improve the performance for practical applications. Here, we report a cost-efficient flexible three-dimensional-Ni (3D-Ni) electrode for a flexible supercapacitor with excellent energy density and power density. The meso-porous 3D-Ni electrode provides a large number of active sites to store charges and good accessibility to the ions in polymer electrolytes, leading to excellent capacitance, high energy density, as well as high power density. The Ni(OH)(2)/3D-Ni positive electrode showed an outstanding specific capacitance of similar to 3400 F/g at 10 A/g and retained 80% of the initial capacitance at 200 A/g. The negative MnO2/3D-Ni electrode exhibited a specific capacitance of 1250 F/g at 10 A/g and excellent capacitance retention of 82% at 200 A/g. The Ni(OH)(2)/3D-Ni//MnO2/3D-Ni hybrid supercapacitor delivered an excellent energy density of 75 Wh/kg and a high power density of 5.3 kW/kg, and these values did not change under bending conditions. The 3D-Ni electrode introduced here represents a new type of ideal electrode that can be easily applied to various flexible/wearable electronic device with excellent performance.
Publisher
Elsevier BV
ISSN
2211-2855
Keyword (Author)
3D-NiEnergy densityFlexible supercapacitorsNi(OH)2Ni-current collectorsWearable device
Keyword
ASYMMETRIC SUPERCAPACITORNICKEL-HYDROXIDECOMPOSITE FILMSGRAPHENEFOAMFABRICATIONNANOSHEETSNI(OH)(2)BATTERIESDEPOSITION

qrcode

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