resumo
Synthesis of any material results not only in the fabrication of the desired composition, but also some amount of undesired second phases. Here we demonstrate that structural heterogeneity in a negative electrode material Li4Ti5O12 with sub-micron grain size synthesized using standard solid-state method can be described locally via structural characterization of single particles using a combination of standard micro-Raman spectroscopy together with scanning electron microscopy. Proposed approach can be used as a kind of low-cost alternative to high-resolution transmission electron microscopy for local structural characterization and a supplement to integral X-ray diffraction techniques not only for Li4Ti5O12, but also for a wide range of commercial products. Copyright (c) 2016 John Wiley & Sons, Ltd.
palavras-chave
LITHIUM-ION BATTERIES; SPINEL LI4TI5O12; RAMAN-SPECTROSCOPY; ANODE MATERIAL; LI-INSERTION; ELECTROCHEMICAL PERFORMANCE; NANOCRYSTALLINE LI4TI5O12; SHUTTLECOCK BATTERIES; ELECTRON-MICROSCOPY; PHASE-EQUILIBRIA
categoria
Spectroscopy
autores
Pelegov, DV; Slautin, BN; Zelenovskiy, PS; Kuznetsov, DK; Kiselev, EA; Alikin, DO; Kholkin, AL; Shur, VY
nossos autores
Andrei Kholkin
Investigador Principal
Denis Alikin
Investigador Auxiliar
Pavel Zelenovskii
InvestigadorGrupos
G2 - Materiais Fotónicos, Eletrónicos e Magnéticos
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
agradecimentos
The authors thank V. S. Gorshkov, JSC Eliont, for his invaluable help in sample synthesis and discussions. The equipment of the Ural Center for Shared Use 'Modern nanotechnology' UrFU was used. The work was supported by Government of the Russian Federation (Act 211, Agreement 02.A03.21.0006). Vladimir Shur acknowledges financial support within the State Task from the Ministry of Education and Science of Russian Federation (Project No. 1366.2014/236). Part of this work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement.