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3D Self-Supported NiS2/Ti3C2Tx-CC Composite Electrode for High-Performance Flexible Supercapacitors.

Authors :
He, Liping
Wu, Fang
Fang, Liang
Hu, Jia
Luo, Haijun
Zhang, Shufang
Hu, Baoshan
Zhou, Miao
Source :
Integrated Ferroelectrics; 2022, Vol. 226 Issue 1, p172-184, 13p
Publication Year :
2022

Abstract

In this paper, a flexible self-supported electrode based on the porous composite of NiS<subscript>2</subscript> and Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript> grown on carbon cloth (NiS<subscript>2</subscript>/Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>-CC) was designed and synthesized. Due to the introduction of highly conductive and flexible Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>, the NiS<subscript>2</subscript>/Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>-CC electrode achieves a 1.4-fold increase (1214 C g<superscript>-1</superscript> at 2 A g<superscript>-1</superscript>) in the specific capacity, a 1.3-fold increase in the rate capability (63% of capacity retention with the current density increases from 2 to 20 A g<superscript>-1</superscript>), and a 2.0-fold increase in the cyclic stability (∼83% of capacity retention at the current density of 20 A g<superscript>-1</superscript> after 2000 charge–discharge cycles) compared with the NiS<subscript>2</subscript>-CC electrode. Meanwhile, there is no obvious capacity attenuation at the bending angle of 180°, indicating the prominent flexibility of the NiS<subscript>2</subscript>/Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>-CC electrode. Accordingly, an all-solid asymmetric supercapacitor (ASC) is fabricated, which exhibits a high energy density of 57.55 Wh kg<superscript>-1</superscript> at the power density of 800 W kg<superscript>-1</superscript>. Furthermore, ∼97% of initial capacity is maintained at the current density of 5 A g<superscript>-1</superscript> after 1000 charge–discharge cycles, indicating the good cycling stability. These satisfactory electrochemical behaviors can be also ascribed to the introduction of Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>, which can facilitate the rapid electron transport at the interface of the composite and maintain the outstanding mechanical integrality of the electrode during charge–discharge processes. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10584587
Volume :
226
Issue :
1
Database :
Complementary Index
Journal :
Integrated Ferroelectrics
Publication Type :
Academic Journal
Accession number :
157269404
Full Text :
https://doi.org/10.1080/10584587.2022.2061205