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Anionic P-substitution toward ternary Ni–S–P nanoparticles immobilized graphene with ultrahigh rate and long cycle life for hybrid supercapacitors.
- Source :
- Journal of Materials Chemistry A; 11/14/2019, Vol. 7 Issue 42, p24374-24388, 15p
- Publication Year :
- 2019
-
Abstract
- Designing and exploring earth-abundant but high-performance electrode materials are of crucial significance for the future large-scale development of supercapacitors. Herein, a facile anionic P-substitution strategy is used to in situ decorate ternary Ni–S–P nanoparticles on graphene nanosheets (G/Ni–S–P) for supercapacitors for the first time. Benefitting from the unique hierarchical structure and positive synergistic effects between each component, the resultant G/Ni–S–P composite delivers a spectacular specific capacity of 1406 C g<superscript>−1</superscript> at 1 A g<superscript>−1</superscript> with an outstanding rate capability of 60.2% at 120 A g<superscript>−1</superscript>, which is highly superior to those of the previously reported nickel based composites. The asymmetric supercapacitor assembled with the G/Ni–S–P and graphene/FeOOH composite as the cathode and anode exhibits high energy density up to 58.1 W h kg<superscript>−1</superscript> and superb electrochemical stability with 4.9% decay after 30 000 continuous charge/discharge cycles. These intriguing electrochemical performances indicate that the G/Ni–S–P composite has enormous potential application in high-performance energy storage systems in the future. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 7
- Issue :
- 42
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 139370306
- Full Text :
- https://doi.org/10.1039/c9ta09902f