التفاصيل البيبلوغرافية
| العنوان: |
Hollow transition metal chalcogenides derived from vanadium-based metal organic framework for hybrid supercapacitors with excellent energy-density and stability. |
| المؤلفون: |
Xie, Yanqiu1 (AUTHOR), Nuñez, Carlos Garcia2 (AUTHOR), Wang, Haoze1 (AUTHOR), Gao, Xin1 (AUTHOR), Zhang, Haopeng1 (AUTHOR), Jiang, Fan1 (AUTHOR), Jia, Kemeng1 (AUTHOR), Li, Qian1 (AUTHOR), Bai, He1 (AUTHOR), Yao, Fei3 (AUTHOR), Yue, Hongyan1 (AUTHOR) hyyue@hrbust.edu.cn |
| المصدر: |
Journal of Colloid & Interface Science. Feb2025:Part B, Vol. 680, p446-455. 10p. |
| مصطلحات موضوعية: |
*TRANSITION metal chalcogenides, *METAL-organic frameworks, *NANORODS, *POWER series, *ENERGY density |
| مستخلص: |
[Display omitted] • V(Ni)-MOF nanorod arrays are grown on nickel foam. • V(NiCo)-X/NF (X = O, S and Se) hollow nanotube arrays with nanosheets are obtained. • The energy storage mechanism of V(NiCo)-Se/NF is explored. • A high specific capacity of 1806.7 C g−1 at 1 A g−1. • An ultra-high energy density of 114.8 Wh kg−1 at 679.5 W kg−1 for the HSC device. In-situ synthesized hollow transition metal chalcogenides have gained significant attention on account of their excellent electrochemical properties. Here, Ni-doped V-MOF (V(Ni)-MOF) nanorod arrays as precursor are first grown on nickel foam (NF). Subsequently, the nanorod arrays are converted into V(NiCo)-OH hollow nanotube arrays with cross-linked nanosheets by Co2+ etching. Finally, V(NiCo)-OH/NF is converted into V(NiCo)-X/NF (X = O, S and Se) by annealing or ion exchange. Due to the unique morphology of hollow nanotube arrays with cross-linked nanosheets and synergistic effect of multi-metal components, the V(NiCo)-Se/NF achieves an outstanding specific capacity (1806.7 C g−1 at 1 A g−1), which is higher than that of V(NiCo)-O/NF (1208.3 C g−1) and V(NiCo)-S/NF (1558.4 C g−1). In addition, the capacity retention rate is 91.7 % (at 10 A g−1 after 10, 000 cycles). Utilizing V(NiCo)-Se/NF (positive) and activated carbon/NF (negative), the hybrid supercapacitor (HSC) achieves an impressive high energy density of 114.8 Wh kg−1 (at 679.5 W kg−1). Moreover, two HSCs in series can power the LED and stopwatch, and keep working for more than 60 min, displaying good practical application capabilities. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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