Morphology- and lattice stability-dependent performance of nanostructured Li4Ti5O12 probed by in situ high-pressure Raman spectroscopy and synchrotron X-ray diffraction
Xiao, FP; Dong, ZH; Mao, HY; Liu, J; Sun, XL; Song, Y; Song, Y (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada.; Song, Y (reprint author), Univ Western Ontario, Soochow Univ Western Univ Ctr Synchrotron Radiat, London, ON N6A 5B9, Canada.
2016
发表期刊CRYSTENGCOMM
ISSN1466-8033
卷号18期号:5页码:736—743
文章类型期刊文献
摘要Nanostructured Li4Ti5O12 (LTO) as a promising anode material in lithium-ion batteries (LIBs) has shown excellent yet morphology-dependent performance in LIB operations. However, the structural origin that influences the material performance at the microscopic level remains unclear. Here, using combined in situ Raman spectroscopy and synchrotron X-ray diffraction, we comparatively investigated the structural stability of two nanostructured LTO materials with different morphologies by application of external pressure up to 27 GPa. In particular, nanoflower-like Li4Ti5O12 spheres (LTO-1) and Li4Ti5O12 nanoparticles (LTO-2) were subjected to high pressures using diamond anvil cells and their structural evolutions were characterized upon compression and decompression. Raman measurements show that both LTO materials undergo pressure-induced structural disorder but with different reversibilities upon decompression. X-ray results further confirmed the Raman measurements, and also allowed the quantitative analysis of pressure dependence of the crystal structures. Structural refinements of the diffraction patterns yield morphology-dependent bulk moduli of the two LTO materials, which reveal critical information about the intrinsic lattice strain and vacancies. These different structural characteristics, when compared with another spinel structure of lithiated titanium dioxide, allow the interpretation of the different performance between LTO-1 and LTO-2 for LIB operations. This study thus contributes to the understanding of the important factors that may influence the electrochemical performance and help with the design of new LTO-based anode materials for LIBs.
关键词Lithium-ion Batteries High-power Electrochemical Performance Structural Transformations Anode Material Spinel Intercalation Electrode Challenges Nanowires
DOI10.1039/c5ce02301g
收录类别SCI
语种英语
WOS记录号WOS:000368859300011
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25777
专题中科院上海应用物理研究所2011-2018年
通讯作者Song, Y (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada.; Song, Y (reprint author), Univ Western Ontario, Soochow Univ Western Univ Ctr Synchrotron Radiat, London, ON N6A 5B9, Canada.
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Xiao, FP,Dong, ZH,Mao, HY,et al. Morphology- and lattice stability-dependent performance of nanostructured Li4Ti5O12 probed by in situ high-pressure Raman spectroscopy and synchrotron X-ray diffraction[J]. CRYSTENGCOMM,2016,18(5):736—743.
APA Xiao, FP.,Dong, ZH.,Mao, HY.,Liu, J.,Sun, XL.,...&Song, Y .(2016).Morphology- and lattice stability-dependent performance of nanostructured Li4Ti5O12 probed by in situ high-pressure Raman spectroscopy and synchrotron X-ray diffraction.CRYSTENGCOMM,18(5),736—743.
MLA Xiao, FP,et al."Morphology- and lattice stability-dependent performance of nanostructured Li4Ti5O12 probed by in situ high-pressure Raman spectroscopy and synchrotron X-ray diffraction".CRYSTENGCOMM 18.5(2016):736—743.
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