Suyuan Li

N-doped amorphous carbon coated Fe3O4/SnO2 coaxial nanofibers as a binder-free self-supported electrode for lithium ion batteries.

N-doped amorphous carbon coated Fe3O4/SnO2 coaxial nanofibers were prepared via a facile approach. The core composite nanofibers were first made by electrospinning technology, then the shells were conformally coated using the chemical bath deposition and subsequent carbonization with polydopamine as a carbon source. When applied as a binder-free self-supported anode for lithium ion batteries, the coaxial nanofibers displayed an enhanced electrochemical storage capacity and excellent rate performance. The morphology of the interwoven nanofibers was maintained even after the rate cycle test. The superior electrochemical performance originates in the structural stability of the N-doped amorphous carbon shells formed by carbonizing polydopamine.

Facile synthesis of rGO/SnO2composite anodes for lithium ion batteries

The reduced graphene oxide/SnO2 (rGO/SnO2) composite was facilely synthesized via a modified colloidal coagulation method and a subsequent reduction. As an anode for lithium ion batteries, it delivers a high reversible capacity of 795 mA h g(-1) in the 600th cycle at a current density of 1000 mA g(-1). The excellent electrochemical performances are mainly due to its morphology stability and the reversible reaction between the formed Li2O and Sn to yield SnO2, as confirmed by XPS and TEM characterization after 200 cycles.

EFFECT OF PD AND RH METALS ON ELECTRICAL-PROPERTIES OF THE SI-SIO2 INTERFACE

Abstract The negative electrical effects of Pd and Rh metals at the Si-SiO 2 interface and the heat treatment behavior of these effects are studied experimentally. In addition, the results of electron spectroscopy analysis of the impurity-doped interfaces are also presented.