Al-doped SnO2 hollow sphere as a novel anode material for lithium ion battery

作者：Wei Chengwen; Zhang Guoxi; Bai Ying^*; Yan Dong; Yu Caiyan; Wan Ning; Zhang Weifeng

来源：Solid State Ionics, 2015, 272: 133-137.

DOI：10.1016/j.ssi.2015.01.014

• Lithium ion battery (LIB)
• Al-doped SnO2 hollow spheres
• Electronic conductivity
• Electrochemical performances

SnO2 hollow spheres are doped with different contents of Al (1,1.5, 2 at.%) by a one-step hydrothermal reaction. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and Brunauer-Emmett-Teller (BET) are utilized to characterize the structures, components, chemical environments, morphologies and specific areas of the as-prepared samples. The investigation in cycling performances demonstrates that 1.5 at.% Al-doped SnO2 hollow spheres exhibit the best cycling stability, with a specific capacity of 443 mAh g(-1) and coulombic efficiency of 99.1% after 50 cycles at 0.1 C, much higher than those of the pristine SnO2 hollow spheres and the other Al-doped samples. The improved electrochemical performances of Al-doped SnO2 hollow spheres are attributed to the increase of electronic conductivity and lithium ion diffusion coefficient, and therefore, enhance the reversible capacity and cycling properties.

• 出版日期2015-4
• 单位河南大学