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- W3214235559 abstract "Lithium titanium oxide Li4Ti5O12 (Li[Li1/3Ti5/3]O4) has been receiving significant attention as an ideal electrode material for lithium-ion batteries, because its cubic lattice parameter (ac) changes negligibly during the electrochemical reaction. However, this same characteristic hinders in-depth understanding of the reaction mechanism, restricting widespread applications, such as use in electric vehicles. We thus employed the recently developed operando X-ray absorption spectroscopy (XAS) and X-ray diffraction (XRD) technique, combined with multivariate curve resolution by alternating least squares (MCR-ALS) method. The MCR-ALS analyses of both the XAS and XRD data confirmed a two-phase reaction scheme consisting of Li[Li1/3Ti5/3]O4 and Li2[Li1/3Ti5/3]O4, but differences in the structural transformations clearly appeared at the two different scales. Linear, reversible changes in the bond distance between Ti and O atoms were observed at the atomic scale (∼1 nm), whereas hysteresis in ac between the discharge and charge reactions was observed at the microscale (∼100 nm). This difference was found to originate from the difference in spatial resolutions between the XAS and XRD techniques." @default.
- W3214235559 created "2021-11-22" @default.
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- W3214235559 date "2022-01-01" @default.
- W3214235559 modified "2023-10-11" @default.
- W3214235559 title "Unveiling scale differences in the two-phase transformation of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si30.svg><mml:msub><mml:mrow><mml:mi mathvariant=normal>Li</mml:mi></mml:mrow><mml:mn>4</mml:mn></mml:msub></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si31.svg><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ti</mml:mi></mml:mrow><mml:mn>5</mml:mn></mml:msub></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg…" @default.
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- W3214235559 doi "https://doi.org/10.1016/j.ensm.2021.11.013" @default.
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