掺杂钛酸锂及其碳纳米管复合材料在锂离子电池中的应用

IF 1.8 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Russian Journal of Inorganic Chemistry Pub Date : 2024-11-30 DOI:10.1134/S0036023624601855

I. A. Stenina, T. L. Kulova, A. B. Yaroslavtsev

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引用次数: 0

摘要

钛酸锂Li4+ xTi5-xMxO12 (M = Sc, Ga, Al, Cr；x = 0, 0.05, 0.1, 0.15)及其与碳纳米管的复合材料采用溶胶-凝胶法合成，并采用x射线粉末衍射、扫描电镜、阻抗谱和7Li MAS NMR谱对其进行了表征；研究了它们的电化学性能。掺杂三价阳离子导致Li4+ xTi5-xMxO12中锂离子迁移率降低，表明锂离子主要通过空位传输。结果表明，碳纳米管掺杂的Li4+ xTi5-xMxO12复合材料的电化学性能最好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Doped Lithium Titanates and their Composites with Carbon Nanotubes as Anodes for Lithium-Ion Batteries

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Doped Lithium Titanates and their Composites with Carbon Nanotubes as Anodes for Lithium-Ion Batteries

Lithium titanates Li_4+xTi_5–xM_xO₁₂ (M = Sc, Ga, Al, Cr; x = 0, 0.05, 0.1, 0.15) and their composites with carbon nanotubes were synthesized by the sol–gel method and characterized using X-ray powder diffraction, scanning electron microscopy, impedance spectroscopy, and ⁷Li MAS NMR spectroscopy; their electrochemical performance was studied. Doping with trivalent cations leads to a decrease in the mobility of lithium ions in Li_4+xTi_5–xM_xO₁₂, which indicates that lithium transport through vacancies predominates in these materials. The best electrochemical characteristics were found for the Li_4+xTi_5–xM_xO₁₂ composites with carbon nanotubes.

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来源期刊

Russian Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

3.10

自引率

38.10%

发文量

237

审稿时长

3 months

期刊介绍： Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.