期刊
JOURNAL OF MATERIALS RESEARCH
卷 36, 期 20, 页码 4120-4130出版社
SPRINGER HEIDELBERG
DOI: 10.1557/s43578-021-00313-3
关键词
Ti/Sn; Composite; Chemical synthesis; Energy storage
资金
- Fundamental Research Grant Scheme of the Ministry of Education [FRGS/1/2019/STG07/UMP/01/1]
- Post-graduate Research Scheme (PGRS) by Universiti Malaysia Pahang [UMP.05.02/26.10/03/03/PGRS2003123]
- Battery Research Centre of Green Energy (BRCGE) of Ming Chi University of Technology, New Taipei City, Taiwan, R.O.C.
- Taiwan Experience Education Program
The study investigates the effect of Sn/Ti ratio on the electrochemical properties of anodes synthesized using a pilot-scale electrospinning system. It is found that increasing Sn content leads to a lowering of electrochemical potential and an enhanced capacity. However, the formation of SnO2 grains in samples with high Sn content negatively impacts cycling stability.
The effect of Sn/Ti ratio on the electrochemical properties of the anode is studied in Sn-doped TiO2 and SnO2-TiO2 nanofibers synthesized using a pilot-scale electrospinning system. Changes in the lattice structure of TiO2 due to the presence of Sn are studied through X-ray diffraction and high-resolution transmission electron microscopy. Lowering of electrochemical potential (vs Li/Li+) is observed alongside the enhanced capacity (400-600 mAh g(-1)) with increasing Sn content. Formation of SnO2 grain in sample with high Sn content (70 wt%) shows detrimental effect on cycling stability due to severe volume changes during lithiation/delithiation. We show that the relative fraction of TiO2 and SnO2 framework determines whether the composite is high capacity or high stability. In overall, SnO2-TiO2 composite anode with optimized Sn/Ti ratio can be used for high energy density, cycling stability and working potential lithium-ion battery. Graphic abstract The relative fraction of TiO2 and SnO2 framework determines whether the composite is high capacity or high stability
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