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