期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 11, 页码 10580-10587出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b02567
关键词
Lithium chromium titanate; Nanowires; Electrospun; Structural evolution; In situ X-ray diffraction; Lithium ion batteries
资金
- National Natural Science Foundation of China [U1632114]
- Ningbo Key Innovation Team [2014B81005]
- Ningbo Natural Science Foundation [2016A610068]
- K. C. Wong Magna Fund of Ningbo University
LiCrTiO4 is a lithium insertion material that is isostructural with Li4Ti5O12. Upon modification of its morphology, LiCrTiO4 nanowires exhibit a high charge capacity of 154.6 mA h g(-1) at 100 mA g(-1), and this value can be maintained at 121.0 mA h even at a high current density of 700 mA g(-1). Furthermore, the cycling performance shows that LiCrTiO4 nanowires can also deliver a reversible capacity of 120.0 mA h g(-1) with 95.6% capacity retention of the first cycle after 550 cycles. The excellent electrochemical properties were revalidated by cyclic voltammetry and electrochemical impedance spectroscopy measurements. The most interesting feature in this work is the relationship between the periodic variation of the (111) peak intensities and the migration of lithium ions during cycling. This proves that LiCrTiO4 nanowires are a zero-strain insertion material that can be a promising anode material for lithium ion batteries.
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