Composite electrode material and preparation method and application thereof
A composite electrode and mixed solution technology, which can be used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve problems such as undiscovered and LDHs agglomeration, and achieve improved cycle stability, fast conductive network, and improved energy density. Effect
Active Publication Date: 2021-10-19
JIANGSU UNIV
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Abstract
The invention belongs to the technical field of energy material preparation, and particularly relates to a composite electrode material and a preparation method and application thereof. According to the preparation method, the porous Ni-MOF/NF is prepared on the foamed nickel by taking Ni(NO3)2.6H2O and 2MI as raw materials, and the Ni-MOF has excellent mechanical properties, a staggered conductive network and rapid electron transmission. The prepared Ni-MOF/NF is put into an N-GQDs solution to be soaked, the N-GQDs have high conductivity, due to the fact that a large number of nitrogen functional groups are doped, the wettability of electrolyte is improved, and after gallium ions are added for etching, the high-performance NiGa-LDHs/N-GQDs/NF composite electrode material is prepared. The reaction of electrolyte ions and an active material is facilitated, the impedance of the material is reduced, and the cycling stability is improved. The asymmetric supercapacitor assembled by using the material as a positive electrode material has ultrahigh power density and energy density, and an effective way is provided for constructing a novel electrode material with high energy storage density, good cycle performance and good power density.
Application Domain
Hybrid capacitor electrodesHybrid/EDL manufacture
Technology Topic
Electron transmissionGallium +11
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PUM
Property | Measurement | Unit |
Particle size | 150.0 | nm |
Specific capacitance | 2079.0 | F/g |
Specific capacitance | 394.0 | F/g |
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