Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 610, Issue -, Pages 70-79Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.12.049
Keywords
Al doping; Supercapacitor; NiCo2O4; Absorption energy; Density functional theory
Categories
Funding
- National Natural Science Foundation of China [61774033]
- Scientific Research Foundation of Graduate School of Southeast University [YBPY2153]
- Youth Project of Science and Technology Research Program of Chongqing Education Commission of China [KJQN202101238]
- Natural Science Foundation of Chongqing [cstc2021jcyj-msxmX1016]
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservior [WEPKL2019ZD-03]
Ask authors/readers for more resources
Morphology engineering and element doping are two effective strategies to enhance the capacitive performance of electroactive materials. In this study, aluminum-doped NiCo2O4 nanosheet-wire structures were successfully prepared, showing high specific capacity, excellent cycling stability, strong adsorption capacity, and enhanced electrical conductivity.
Morphology engineering and element doping are two effective strategies to boost the capacitive performance of electroactive materials. The morphology control through doping process is conducive to simplifying the preparation process. Herein, an aluminum-doped (Al-doped) strategy was used to prepare Al-doped NiCo2O4 nanosheet-wire structure (Al-NiCo2O4 NSW) by hydrothermal method and subsequent calcination. The nanosheet-wire structure was composed of one-dimensional (1D) nanowires and two-dimensional (2D) ultrathin nanosheets. 1D nanowires can provide efficient pathways for the electrons/ions transport. 2D nanosheets can enlarge the specific surface area and expose more active sites. The Al doping can change the electronic structure of NiCo2O4 with enhanced electrical conductivity as revealed by density functional theory (DFT) calculations. Meanwhile, a strong adsorption capacity of OH- was obtained on Al-NiCo2O4 NSW for redox reactions. The Al-NiCo2O4 NSW electrode demonstrated a high specific capacity of 1441C g(-1) (2446F g(-1)) at 1 Ag-1 and excellent cycling stability (87.6% capacity retention at 10 A g(-1) for 5000 charge-discharge cycles). The assembled asymmetric supercapacitor manifested a superior energy density of 46.2 Wh Kg(-1) at a power density of 800 W kg(-1) . (C) 2021 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available