The Ni-Fe alloy coatings were prepared by electro-deposited method,and the effects of the saccharin content in the electrolytes on the microstructure of the coatings were studied by using X-ray diffractometry(XRD),sca...The Ni-Fe alloy coatings were prepared by electro-deposited method,and the effects of the saccharin content in the electrolytes on the microstructure of the coatings were studied by using X-ray diffractometry(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The results show that the saccharin content in the bath affects the plating rates and the current efficiency remarkably.As the saccharin content increases,the grain size of the Ni-Fe alloys decreases.The average grain size of the deposits varies from 13 nm to 10.8 nm as the saccharin content increases from 0 g/L to 8 g/L.Accordingly,the microhardness of the as-cold deformed samples increases from Hv 600 to Hv 656.展开更多
Tin films on copper substrate, obtained by electrodeposition procedure, were structural and electrochemical characterized. In particular to investigate the possibility to use such metal as possible negative electrode ...Tin films on copper substrate, obtained by electrodeposition procedure, were structural and electrochemical characterized. In particular to investigate the possibility to use such metal as possible negative electrode in Na＋ rechargeable batteries, EPS （electrochemical potential spectroscopy） and galvanostatic charge/discharge cycling of the electrodes were investigated, at room temperature in organic electrolyte. Three crystalline and one amorphous phases were identified as well as high discharge capacity （738 mAb/g） was obtained after 4 cycles. Unfortunately material fading, due to the internal stress during sodiation/desodiation process, causes poor cyclability.展开更多
基金Project(599270) supported by Hebei Provincial Foundation,China
文摘The Ni-Fe alloy coatings were prepared by electro-deposited method,and the effects of the saccharin content in the electrolytes on the microstructure of the coatings were studied by using X-ray diffractometry(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The results show that the saccharin content in the bath affects the plating rates and the current efficiency remarkably.As the saccharin content increases,the grain size of the Ni-Fe alloys decreases.The average grain size of the deposits varies from 13 nm to 10.8 nm as the saccharin content increases from 0 g/L to 8 g/L.Accordingly,the microhardness of the as-cold deformed samples increases from Hv 600 to Hv 656.
文摘Tin films on copper substrate, obtained by electrodeposition procedure, were structural and electrochemical characterized. In particular to investigate the possibility to use such metal as possible negative electrode in Na＋ rechargeable batteries, EPS （electrochemical potential spectroscopy） and galvanostatic charge/discharge cycling of the electrodes were investigated, at room temperature in organic electrolyte. Three crystalline and one amorphous phases were identified as well as high discharge capacity （738 mAb/g） was obtained after 4 cycles. Unfortunately material fading, due to the internal stress during sodiation/desodiation process, causes poor cyclability.
