Abstract:

The morphologies of SnSb/carbon nanofibers were rebuilt by the deep cryogenic treatment to improve the fibers properties. The influence of deep cryogenic treatment on SnSb/carbon nanofibers morphologies were studied by adjusting the process order of deep cryogenic treatment and carbonization.  The result mechanism was explored according to analysis on the crystalline structure and the carbon contents. The results showed that a core-shell structure is built by first treated electrospun SnSb/carbon nanofibers precursor using carbonization and then performing the deep cryogenic treatment, while an uneven dispersed SnSb alloy in nanofibers is built by first treated electrospun SnSb/carbon nanofibers precursor using the deep cryogenic treatment and then carbonizing. The increased carbon contents appeared in SnSb/carbon nanofibers after the deep cryogenic treatment. The influence of grain refinement is responsible for the morphologies rebuilt of SnSb/carbon nanofibers based on the analysis of crystalline structure.

Key words: SnSb/carbon nanofiber, deep cryogenic treatment, morphology rebuilding, carbonization