Binder­Free High­Performance MXene Supercapacitors Fabricated by a Simple Electrospray Deposition Technique

Title
Binder­Free High­Performance MXene Supercapacitors Fabricated by a Simple Electrospray Deposition Technique
Authors
김동영조상원서용석
Keywords
2D materials; electrospray; MXene; supercapacitors
Issue Date
2020-11
Publisher
Advanced materials interfaces
Citation
VOL 7, NO 22-8
Abstract
In this work, an electrospray deposition (ESD) technique is applied to fabricate binder­free porous 2D MXene (Ti3C2Tx) electrodes for supercapacitor applications. As a result of the crumpling of MXene flakes induced by the capillary force during drying, a porous structure is formed between MXene flakes within the electrode which leads to the formation of channels for rapid ion­diffusion. Together with binder­free networks of highly electrical conductive MXene sheets, these ion diffusion channels greatly improve the rate capability of the electrospray MXene electrode. Cyclic voltammetry measurements show that micron­thickness electrodes retain their capacitive rectangular­shaped curves even at a very high scan rate of 10?000 mV s?1 in KOH electrolyte. A specific capacitance as high as 400 F g?1 is also recorded in H2SO4 electrolyte and this high specific capacitance maintains 85% of its value when the scan rate is increased to 1000 mV s?1. Furthermore, the electrospray MXene electrode shows good cycle stability in H2SO4 without a binder. About 90% of the capacitance is maintained after 10?000 charge?discharge cycles at a current density of 15 A g?1. All of these results show that the ESD MXene electrodes are a promising candidate for supercapacitor applications that require both high capacitance and enhanced rate capability.
URI
http://pubs.kist.re.kr/handle/201004/72337
ISSN
2196-7350
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