Array type metal sulfide composite electrode material and preparation method thereof

Abstract

The preparation method of the array type metal sulfide composite electrode material comprises the following steps: step 1, taking a copper mesh substrate, slicing, ultrasonically cleaning, and dryingfor later use; 2, adopting an electrochemical workstation, adopting a constant current mode, taking foamy copper as a working electrode, taking mercury oxide as a reference electrode, taking a platinum sheet as a counter electrode and taking NaOH as an electrolyte, and electroplating to prepare a Cu(OH)2 nano array; 3, putting the prepared Cu(OH)2 nano array into a tubular furnace for annealing treatment to prepare a copper peroxide CuO2 nano array; 4, carrying out vulcanization treatment on the annealed copper peroxide CuO2 nano array sample to prepare a Cu9S5 nano array; and 5, coating a layer of conductive polymer ppy outside the Cu9S5 nano array by adopting an electroplating method to prepare a Cu9S5@ppy nano array. Therefore, the vertical Cu9S5 nanosheet is prepared on the surface ofthe foamy copper, and a layer of polypyrrole is coated outside the Cu9S5 nanosheet, so that the stability of the electrode material is improved, and the obtained electrode material has excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to an array type metal sulfide electrode composite material and a preparation method thereof. Background technique [0002] With the rapid development of society, people's demand for energy is also increasing. Sustained and stable energy supply has become one of the biggest challenges facing the development of modern society. As far as the current situation is concerned, the total amount of resources in the earth is still abundant, and the energy crisis will not occur in a short time. For example, the coal reserves contained in the earth's crust are still enough to generate electricity for hundreds of years. However, the use of traditional fossil energy will inevitably cause greenhouse gas emissions and damage to the environment, and continued unscrupulous exploitation may bring disastrous climate impacts. Therefore, the development of green and environmentall...

AI Technical Summary

Problems solved by technology

However, when it is used as the negative electrode of sodium-ion batteries, it generally has the disadvantages of poor conductivity and large volume expansion changes, which leads to low actual capacity and poor cycle stability.

Images