Effect of Nitrogen and Sulfur Co-Doped Graphene on the Electrochemical Hydrogen Storage Performance of Co0.9Cu0.1Si Alloy

Co0.9Cu0.1Si alloy was prepared by mechanical alloying method. Nitrogen-doped graphene (NG) and nitrogen–sulfur co-doped (NSG) were hydrothermal 5 wt% oxide, NG NSG doped into alloy, respectively, ball milling to improve the electrochemical hydrogen storage performance of composite material. X-ray diffraction scanning electron microscopy used characterize structure morphology material, LAND battery test system three-electrode The material showed better discharge capacity cycle stability than pristine alloy. In addition, in order study optimal ratio NSG, 3%, 5%, 7% 10% respectively. with 5% had best among all samples. 580.1 mAh/g, its highest retention rate 64.1%. improvement can be attributed two aspects. On one hand, electrocatalytic is improved co-doping nitrogen sulfur, on other has excellent electrical conductivity.