ABSTRACT
Ultra-thin SiO(x) (0 < x < 2) nanosheets were obtained via a convenient solvothermal route from a Zintl compound CaSi2. After carbon coating, the SiOx@C nanosheet anodes exhibit high capacity, good rate and superior cycling performance for high-capacity lithium ion battery applications. The specific capacity can be maintained as high as 760 mA h g(-1) with almost no capacity decay after 400 cycles at a current density of 0.5 A g(-1).
ABSTRACT
Hollow-structured Si/SiC@C nanospheres were prepared through a magnesiothermic reduction of resin-coated SiO2 spheres. These nanostructured materials with high surface area not only show high adsorption capacities of industrial dyes from wastewater, but also exhibit excellent catalytic activities for chemical fixation of CO2 under mild, solvent-free conditions.
ABSTRACT
Nanostructured silicon hollow spheres with a thin shell have been synthesized by magnesium reduction of silica spheres, which possess a high BET surface area and are electrochemically active in capacitive energy storage with a maximum specific capacitance of 193 F g(-1) in the neutral Na(2)SO(4) aqueous solution.