Research On The Controlled Growth And Properties Of Two-dimensional Rhenium Disulfide Crystal

With the growing environmental problems,finding a suitable clean energy source is the top-priority task.Lithium batteries and hydrogen energy are the two most widely utilized clean energy sources in the modern society,and how to improve the performance of lithium batteries and achieve efficient catalytic hydrogen production are the most popular research topics at present.In this paper,we take the large-area growth and application of two-dimensional rhenium disulfide as the entry point,and use chemical vapor deposition（CVD）to achieve the first vertical growth of large-area two-dimensional rhenium disulfide crystals under different substrates using the catalytic effect of metal thin films,and apply Pt/ReS2 to electrocatalytic hydrogen precipitation,and use CVD to grow rhenium disulfide on the surface of carbon nanotubes as the lithium-ion battery negative electrode to improve the performance of lithium batteries.The main research is as follows:1.The vertical growth of two-dimensional rhenium disulfide crystals on Cu,TiN,Al,Pt film layers and conductive glass was achieved by CVD system,and the optimal experimental conditions for the growth were determined,in which the size of rhenium disulfide nanosheets grown vertically on Pt film was about 2-3μm and the height was about 1μm.and the substrate with vertical rhenium disulfide growth was directly used as the working electrode,and the current density reached 1 mA cm^-2,the hydrogen precipitation overpotential is about 150 mV lower than that of the pure Pt working electrode,and the Tafel slope is as low as 91 mV dec^-1.2.Using a modified CVD system to achieve uniform coverage growth of ReS₂ on the surface of carbon tubes,the ReS₂/CNTs composite electrode was assembled in a button cell,and the cell presented a stable capacity of 488 mAh g^-1at 5C magnification.The negative electrode maintained a reversible capacity of 1050 mAh g^-1 after nearly60 cycles at 0.2C,which significantly improved the battery performance compared with the CNTs electrode,indicating that the ReS₂/CNTs composite significantly improved the performance of Li-ion batteries.