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SnO2/WO3 core-shell nanorods and their high reversible capacity as lithium-ion battery anodes
Xin-Yu Xue1, Bin He, Shuang Yuan
1College of Sciences, Northeastern University, Shenyang, People's Republic of China. xuexinyu@mail.neu.edu.cn
Abstract:
WO(3) nanorods are uniformly coated with SnO(2) nanoparticles via a facile wet-chemical route. The reversible capacity of SnO(2)/WO(3) core-shell nanorods is 845.9 mA h g(-1), higher than that of bare WO(3) nanorods, SnO(2) nanostructures, and traditional theoretical results. Such behavior can be attributed to a novel mechanism by which nanostructured metallic tungsten makes extra Li(2)O (from SnO(2)) reversibly convert to Li(+). This mechanism is confirmed by x-ray diffraction results. Our results open a way for enhancing the reversible capacity of alloy-type metal oxide anode materials.
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