Synthesis of In2O3/Carbon Core-Shell Nanospheres and their Electrochemical Performance

Abstract

In2O3/C core-shell nanospheres have been synthesized via template-free hydrothermal approach at 200 °C first, then treated in glucose aqueous solution and annealed at 500 °C. The products were around 100 nm in dimension with carbon shell about 10 nm in thickness. Electrochemical tests demonstrated that the In2O3/C core-shell nanospheres had an initial discharge capacity as high as 1607 mAh g-1 and the discharge capacity of 569 mAh g-1 after 50 cycles at 0.1 C. Moreover, the products showed the discharge capacities of 578, 361, 279, 173 mAh g-1 at the rates of 0.1, 0.2, 0.5 and 1 C, respectively.