Preparation method of aluminum-doped nickel sulfide nano-flower material

Abstract

The invention discloses a preparation method of an aluminum-doped nickel sulfide nano-flower material. The method comprises the following steps: (1) after mixing soluble nickel salt, soluble aluminum salt and an alkaline precipitant in a specific solvent, enabling the materials to react sufficiently by utilizing a hydrothermal method; washing and drying to obtain an alkaline carbonate precursor; (2) dispersing the precursor and a sulfur-containing compound into a water solution and carrying out hydrothermal reaction; washing and drying to obtain aluminum-doped nickel sulfide nano-flowers. A preparation method of an aluminum-doped nickel sulfide nano-flower electrode, provided by the invention, has a moderate process and raw materials are cheap; compared with an electrode made of a traditional nickel sulfide material, the capacitance characteristics and cycling stability of the aluminum-doped nickel sulfide nano-flower electrode are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage devices, and more specifically relates to a preparation method of an aluminum-doped nickel sulfide nanoflower material. Background technique [0002] The emerging supercapacitor in recent years is a new type of energy storage device based on the electrochemical process at the electrode / solution interface, between traditional capacitors and batteries. At present, research on supercapacitors mainly focuses on the preparation of high-performance electrode materials. [0003] Due to its excellent electrochemical properties, ruthenium dioxide is currently recognized as the most suitable material for supercapacitor electrodes, but the metal ruthenium content is extremely low and the price is very expensive, which is not suitable for large-scale commercial applications. Therefore, it is necessary to look for electrode materials with low price and excellent performance as an altern...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the invention provides a method for preparing an aluminum-doped nickel sulfide material, the purpose of which is to solve the problems of poor performance and complicated preparation process of the existing nickel sulfide. The aluminum-doped nickel sulfide nanoflower electrode material is prepared by hydrothermal method, and the cobalt element is replaced by the cheaper and common aluminum element. After the second step of sulfidation, aluminum-doped nickel sulfide nanoflowers can be obtained

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