Hydrogen Evolution And Battery Properties Of Different Thiostannate

In this paper,the stannates of different ligands were prepared by one-step hydrothermal method,and used as material electrodes in electrocatalytic hydrogen evolution and potassium ion batteries.In order to improve the overpotential of the thiostannate,modify the morphology of the active material and prepare a better thiostannate electrode,the active material thiostannate,prepared by one-step hydrothermal method,was soaked into nickel solution with different concentrations to modify the morphology,and then the electrode was made.The performance of different nickel concentrations on overpotential of active material was explored by using AC impedance method,linear voltammetry and other electrochemical method,X-ray diffraction（XRD）,scanning electron microscope（SEM）,energy dispersive X-ray spectroscopy（EDS）,ICP,X-ray photoelectron spectroscopy（XPS）,Raman spectroscopy（Raman）,infrared spectroscopy（FTIR）and automatic specific surface area（BET）,and other physical and chemical characterization method.The AC impedance curve showed that the conductivity of the active material could be improved by soaking Ni⁺solution,and the electrode polarization curve showed that the introduction of Ni⁺increased the overpotential of the active material HKTS.In this paper,the basic properties of potassium ion batteries,of which the materials were K_xSn_yP_z,K_xSn_yS_zand K_xSn_yMg_1-yS_zwith different ligands,were studied.It was found that the electrical conductivity,the specific volume of first charge and discharge,and the circulation performance of K_xSn_yS_zwere much better than that of K_xSn_yP_zand K_xSn_yMg_1-yS_z.The capacity retention rate was 84.4%after30 weeks.Forthermore,XRD,SEM,EDS,XPS and FTIR were carried out to analyze the characterization of K_xSn_yP_z,K_xSn_yS_zand K_xSn_yMg_1-yS_z.It was found that the surface morphology and crystal structure of the three kinds of materials were influenced by different ligands.