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Self-Grown 1D/2D Ni(OH)2 nanofiber/nanosheet on corn stigma-derived carbon for high-performance hybrid supercapacitors.
- Source :
-
Applied Surface Science . Jan2023, Vol. 609, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] • Hierarchical 1D/2D Ni(OH) 2 /PCC is fabricated via a facile hydrothermal route as the positive electrode. • The porous corn stigma-derived carbon with the 3D open framework is preparated as the negative electrode. • Explore the excellent electrochemical performance of 1D/2D Ni(OH) 2 /PCC by DFT. • The hybrid supercapacitor displays supeiror energy and power density. Enhancing the energy density of supercapacitors is of great scientific and technological importance, producing a larger energy density than traditional symmetrical carbon supercapacitors. Herein, a hybrid supercapacitor based on an activated corn stigma-derived carbon (PCC) electrode combined with a large-capacity faradic 1D nanofiber/2D nanosheet Ni(OH) 2 electrode is designed to fulfill this goal. Benefiting from the highly conductive, porous construction, and 3D open framework of PCC electrode couple with unique hierarchical 1D nanofiber/2D nanosheet Ni(OH) 2 , such 1D/2D Ni(OH) 2 /PCC electrode is capable of increasing accessible active sites, shortening ion-diffusion path, and accelerating mass transfer. More importantly, DFT calculations unveil that 1D/2D Ni(OH) 2 /PCC composites own high electrical conductivity and OH– adsorption energy. Therefore, the specific capacity of the 1D/2D Ni(OH) 2 /PCC composite electrode reaches 655.9C g−1 at the current density of 1 A/g. Moreover, such hybrid 1D/2D Ni(OH) 2 /PCC||PCC supercapacitor show an outstanding energy density and power density of 38.6 Wh kg−1, and 1.03 kW kg−1, respectively. This work provides the possibility of fabricating hierarchical hydroxide/bio-carbon as a better electrode for high-energy–density electrochemical supercapacitors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 609
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 160209384
- Full Text :
- https://doi.org/10.1016/j.apsusc.2022.155448