Journal
APPLIED SURFACE SCIENCE
Volume 614, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.156174
Keywords
Supercapacitor; Nanorod; Energy density; Oxygen vacancy; CuCoLDH
Ask authors/readers for more resources
The performance of optimization layered double hydroxide (LDH) electrodes via oxygen vacancy engineering is of great significance for high-performance hybrid supercapacitors. The addition of oxygen vacancy does not affect the original unique layered structure and creates more active centers, promoting faster electron transfer and ion conversion. The as-assembled Ov-CuCoLDH electrode shows an outstanding specific capacity of 1392.4 F g-1 and high degree of stability.
The performance of optimization layered double hydroxide (LDH) electrodes via oxygen vacancy engineering is of great significance for high-performance hybrid supercapacitors. Herein, we obtain oxygen-rich CuCoLDH (OvCuCoLDH) nanoarray structure by in-situ etching of Co-MOF nanorods and subsequent NaBH4 reduction. The addition of oxygen vacancy does not affect the original unique layered structure and creates more active centers, promoting faster electron transfer and ion conversion. Moreover, this method maximizes the synergistic effect between copper and cobalt ions. The as-assembled Ov-CuCoLDH electrode shows an outstanding specific capacity of 1392.4 F g-1. Furthermore, forming the Ov-CuCoLDH and AC electrodes possesses 58.2 W h kg-1 of energy density (at a power density of 850 W kg-1). At the end of 10,000 cycles, the CF@Ov-CuCoLDH//AC device keeps 86.7 % of the original capacitance, indicating a high degree of stability. The results show that the strategy of introducing oxygen vacancy by a mild and effective method to improve the capacity of LDH has a certain guiding significance for designing higher-performance electrode materials.
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