Low-cost ZnNCN material preparation method

Abstract

The invention belongs to the field of preparation of ZnNCN materials, in particular to a low-cost ZnNCN material preparation method. The method comprises the following step of synthesizing truncated rhombic dodecahedral zeolite imidazole ester skeleton-8 (TRD-ZIF-8) nanoparticles, concretely, adding 10ml of an aqueous solution in which Zn (CH3COO) 2.2 H2O (600mg) is dissolved into 10ml of an aqueous solution in which 2-methylimidazole (0.54 mM) and CTAB (2.58 mM) are dissolved, slowly stirring the solution for several seconds, after 10 minutes, changing the original transparent solution into awhite solution, standing the solution at room temperature for 3 hours, carrying out centrifuging at 9000r.p.m, enriching the solution in a 50mL centrifuge tube, and then washing the obtained TRD-ZIF-8 nanoparticles with deionized water for three times. The ZnNCN material disclosed by the invention is relatively high in yield, and the nanoparticles are relatively small in particle size, relativelylarge in specific surface area and stable in electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of ZnNCN material preparation, in particular to a low-cost ZnNCN material preparation method. Background technique [0002] As a new generation of energy storage devices, supercapacitors due to such as high power density (>10,000W kg -1 ), long cycle life (>10 5 ), low maintenance cost and environmental friendliness have attracted widespread attention. Among the numerous candidate classes of supercapacitors, pseudocapacitors have shown great potential due to their high energy density and fast reversible surface redox reactions. Currently, transition metal oxides (FeO x , NiO x , CoO x etc.) as a common pseudocapacitive electrode material, which is mainly due to its low cost, environmental friendliness and high abundance. However, transition metal oxide materials usually suffer from poor electrical conductivity, fast capacity fading, and poor cycling stability during energy storage, which severely...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the ubiquitous production cost higher in the existing nano-scale ZnNCN preparation technology, the productive rate is lower, the prepared nano-particle size is larger, the shortcomings such as smaller specific surface area, and propose a A low-cost and large-area ZnNCN material preparation method, in addition, the material has excellent electrochemical performance after being prepared as a supercapacitor

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