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DOI	10.1039/c7ee00763a
	Li2TiSiO5: A low potential and large capacity Ti-based anode material for Li-ion batteries
	Liu J.; Pang W.K.; Zhou T.; Chen L.; Wang Y.; Peterson V.K.; Yang Z.; Guo Z.; Xia Y.
发表日期	2017
ISSN	17545692
起始页码	1456
结束页码	1464
卷号	10 期号:6
英文摘要	To date, anode materials for lithium-ion batteries (LIBs) have been dominated by carbonaceous materials, which have a low intercalation potential but easily allow lithium dendrites to form under high current density, leading to a safety risk. The other anode material, the "zero-strain" spinel-structured Li4Ti5O12, with a ∼1.5 V vs. Li+/Li intercalation potential, exhibits excellent cycling stability and avoids the issues of dendrite growth and Li plating. The low capacity and high voltage of Li4Ti5O12, however, result in low energy density. Herein, we report a new and environmentally friendly anode material, Li2TiSiO5, which delivers a capacity as high as 308 mA h g-1, with a working potential of 0.28 V vs. Li+/Li, and excellent cycling stability. The lithium-storage mechanism of this material is also proposed based on the combination of in situ synchrotron X-ray diffraction, neutron powder diffraction with Fourier density mapping, ex situ X-ray absorption near edge structure analysis, ex situ transmission electron microscopy, and density-functional theory calculations with the projector-augmented-wave formalism. The lithium-storage mechanism of this material is shown to involve a two-electron (Ti4+/Ti2+ redox) conversion reaction between TiO and Li4SiO4. © The Royal Society of Chemistry 2017.
英文关键词	Anodes; Density functional theory; Electric batteries; Electrodes; High resolution transmission electron microscopy; Lithium; Lithium compounds; Secondary batteries; Transmission electron microscopy; X ray absorption near edge structure spectroscopy; X ray diffraction; Carbonaceous materials; Conversion reactions; Cycling stability; High current densities; In-situ synchrotrons; Lithium dendrite; Lithium storages; Projector augmented waves; Lithium-ion batteries; electrode; lithium; safety; X-ray diffraction; XANES spectroscopy
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190477
作者单位	Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai, 200433, China; School of Mechanical, Materials, and Mechatronic Engineering, Institute for Superconducting and Electronic Materials, Faculty of Engineering, University of Wollongong, Wollongong, NSW 2522, Australia; Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia; State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (MOE), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai, 200433, China
推荐引用方式 GB/T 7714	Liu J.,Pang W.K.,Zhou T.,et al. Li2TiSiO5: A low potential and large capacity Ti-based anode material for Li-ion batteries[J],2017,10(6).
APA	Liu J..,Pang W.K..,Zhou T..,Chen L..,Wang Y..,...&Xia Y..(2017).Li2TiSiO5: A low potential and large capacity Ti-based anode material for Li-ion batteries.Energy & Environmental Science,10(6).
MLA	Liu J.,et al."Li2TiSiO5: A low potential and large capacity Ti-based anode material for Li-ion batteries".Energy & Environmental Science 10.6(2017).