重量分析
阳极
材料科学
电化学
离子
电流密度
扩散
化学工程
电池(电)
纳米技术
化学
电极
物理化学
有机化学
工程类
物理
功率(物理)
热力学
量子力学
作者
Xiaoxiao Lü,Fang Luo,Qinqin Xiong,Hongzhong Chi,Haiying Qin,Zhenguo Ji,Lingcong Tong,Hongge Pan
标识
DOI:10.1016/j.materresbull.2017.10.040
摘要
This paper reported a high tap density SnO2 nanosphere with bimodal sizes distribution, which derived from Sn-based metal-organic frameworks (Sn-MOF) precursors. When used as anodes for Na-ion batteries, the SnO2 nanosphere was demonstrated with a high reversible sodium storage capacity of 417 mAh g−1 at a current density of 50 mA g−1 after 100 cycles. Even at a high current density of 1200 mA g−1, a reversible capacity of 105 mAh g−1 can be obtained. Additionally, regarding to the packed volumetric capacity, the SnO2 nanosphere electrode demonstrated a high value of around 970 mAh cm−3, can be considered as a high volumetric capacity anode material. The excellent electrochemical performance could be ascribed to aspects of structural stability, high packing density and high Na+ diffusion rates of the SnO2 nanosphere electrode. This work provides a new pathway to prepared nanostructured SnO2 materials, and demonstrated a high performance anode material for Na-ion battery with great specific capacity and cycling performance.
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