1. Construction of NiCoS@NiMo-LDH hierarchical composite for high-performance supercapacitors.
- Author
-
Luo, D.P., Chen, Y.H., Chen, Y.B., Wei, Z.H., Zhang, L., Ye, X.Y., Wang, Q.T., and Ma, L.A.
- Subjects
- *
ENERGY density , *CARBON electrodes , *NEGATIVE electrode , *SUPERCAPACITORS , *ION transport (Biology) , *CARBON foams , *ION channels , *FOAM - Abstract
• The NiCoS@NiMo-LDH hierarchical composites are synthesized on Ni foam. • NiCoS@NiMo-LDH nanostructure provides abundant active sites and enough ion channels. • The binder-free NiCoS@NiMo-LDH electrode exhibits excellent electrochemical properties. • The fabricated ASC device exhibits a high energy density and good stability. Ni(OH) 2 ·0.75H 2 O nanosheets embedded with NiMoO 4 nanoparticles (NiMo-LDH) supported by nickel cobalt sulfur (NiCoS) nanorods were prepared by a multi-step hydrothermal method, which provides an effective channel for ion transport and abundant active sites for charge storage. The NiCoS@NiMo-LDH electrode exhibited a very high capacitance of 1302.5 μAh cm−2 at 10 mA cm−2, with 54 % capacitance retention observed at 50 mA cm−2. The asymmetric supercapacitor (ASC) assembled with the NiCoS@NiMo-LDH as the positive electrode and active carbon (AC) as the negative electrodes which exhibits an energy density of 1096.6 μWh cm−2 at a power density of 2.8 mW cm−2 along with good stability of 86.67 % after 5000 cycles. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF