Co derived from zif-67 2 p@ni 2 p/cc Honeycomb Nanosheet Composite and Its Application
A technology of ZIF-67 and composite materials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of easy structure collapse, high electronegativity of oxygen element, unfavorable electron transport, and poor structural stability of transition metal oxides and other problems, to achieve the effect of simple and easy to realize the preparation process, promote the electron transport efficiency, and improve the electrochemical performance
Active Publication Date: 2022-04-05
LIAONING UNIVERSITY
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Problems solved by technology
However, the structure of MOFs is easy to collapse after carbonization, the electrochemical performance is unstable, and the high electronegativity of oxygen element (O) is not conducive to electron transport.
When transition metal oxides are used as electrode materials, they can provide high-efficiency electrochemical performance through oxidation-reduction reactions. However, a single transition metal oxide has poor structural stability and is prone to agglomeration during the synthesis process, resulting in serious capacity loss and shortening the service life of electrode materials.
Method used
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Embodiment 1
[0027] Example 1 is based on the Co derived from ZIF-67 2 P@Ni 2 P / CC Honeycomb Nanosheet Composite Material
[0028] (1) The preparation method is as follows
[0029] 1. Hydrophilic treatment of carbon cloth (CC)
[0030] First, cut the carbon cloth into a size of 1×1.5cm, put it in a beaker containing deionized water, take it out after ultrasonication for 30min, and dry it in a vacuum oven at 60°C for 12h; then, put it in a reaction kettle containing concentrated nitric acid , move the reaction kettle into an oven, heat treatment at 100°C for 3h, cool to room temperature, wash with deionized water until neutral, move into a vacuum drying oven to dry at 60°C for 12h, and set aside.
[0031] 2. Synthesis of ZIF-67 / CC precursor
[0032] 0.58g Co(NO 3 ) 2 ·6H 2O and 1.31g 2-methylimidazole were dissolved in 20mL deionized water respectively, and the 2-methylimidazole aqueous solution was quickly poured into Co(NO 3 ) 2 ·6H 2 O aqueous solution, stirred at room temperat...
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Abstract
The present invention relates to Co derived from ZIF‑67 2 P@Ni 2 P / CC honeycomb nanosheet composites and their applications. Will Co(NO 3 ) 2 ·6H 2 O, 2-methylimidazole, and deionized water were stirred at room temperature, and the resulting mixture was put into the hydrophilic-treated carbon cloth CC, left to stand at room temperature for 4 hours, washed and dried to obtain the ZIF-67 / CC material, etched ‑Carbonization‑phosphating to produce the target product Co 2 P@Ni 2 P / CC composites. The present invention adopts the method of in-situ growth-etching-carbonization-phosphating to prepare the composite electrode material of honeycomb nanosheets, and the three-electrode test shows that at a current density of 2mA cm ‑2 , the area specific capacitance of the electrode material reaches 2876mF cm ‑2 . co 2 P@Ni 2 The preparation process of the P / CC composite material is easy to realize and the preparation cost is low, and it can be used as an electrode material for a supercapacitor.
Description
technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, in particular, relates to Co 2 P@Ni 2 A preparation method of P / CC honeycomb nano sheet composite material. Background technique [0002] In recent years, with the rapid development of the global economy, fossil resources have been depleted and the ecological environment has deteriorated seriously. Therefore, sustainable and renewable resources must be utilized, such as wind energy, tidal energy and solar energy. At present, how to establish an efficient energy storage system has become the main problem to be solved urgently in the development of sustainable energy. Currently, energy storage devices for electrical energy include batteries and capacitors. Among these energy storage devices, supercapacitors have the advantages of providing huge electric energy output in a very short time, especially compared with traditional capacitors, fuel cells a...
Claims
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IPC IPC(8): H01G11/34H01G11/86H01G11/36H01G11/24H01G11/26H01G11/30
CPCH01G11/34H01G11/86H01G11/36H01G11/24H01G11/26H01G11/30Y02E60/13
Inventor 韩正波宋文伟王兵
Owner LIAONING UNIVERSITY