STEM study of Li4Ti5O12 anode material modified with Ag nanoparticles

Mariusz Andrzejczuk , Agata Roguska , M Michalska , L. Lipińska , Adam Czerwiński , M. Cantoni , Agnieszka Krawczyńska , Małgorzata Lewandowska

Abstract

Comprehensive scanning transmission electron microscopy (STEM) analysis of Li4Ti5O12 (LTO) powder modified by deposited Ag nanoparticles was performed. Nanocomposite powders with Ag content of 1 wt.%, 4 wt.%, 10 wt.% were fabricated in a chemical process from suspensions of Ag and LTO. Apart from the STEM results, the presence of pure silver on the surface of the ceramic powder was confirmed by XRD and XPS analyses. The silver particles deposited on the LTO particles were characterized using the EDS mapping technique. The quantified results of the EDS mapping showed a relatively homogenous distribution of silver nanoparticles on the powder surface for every metal content. The mean diameter of the nanoparticles deposited on the LTO powder was about 4 nm in all cases. An increase in the Ag content during chemical surfacemodification did not cause changes in themicrostructure. Focusing on an analysis of the metallic nanoparticles on the ceramic powder, electron tomography was used as an investigative technique. A very precise analysis of three dimensional nanostructures is desirable for a comprehensive analysis of complex materials. The quantified analysis of the Ag nanoparticles visualized using electron tomography confirmed the results of the size measurements taken from the two-dimensional EDS maps.
Author Mariusz Andrzejczuk ZPM
Mariusz Andrzejczuk,,
- Division of Materials Design
, Agata Roguska - [Institute of Physical Chemistry Polish Academy of Sciences (IChF PAN)]
Agata Roguska,,
-
- Instytut Chemii Fizycznej Polskiej Akademii Nauk
, M Michalska
M Michalska,,
-
, L. Lipińska
L. Lipińska,,
-
, Adam Czerwiński ZOiF
Adam Czerwiński,,
- Optics and Photonics Division
, M. Cantoni
M. Cantoni,,
-
, Agnieszka Krawczyńska ZPM
Agnieszka Krawczyńska,,
- Division of Materials Design
, Małgorzata Lewandowska ZPM
Małgorzata Lewandowska,,
- Division of Materials Design
Journal seriesJournal of Microscopy, ISSN 0022-2720
Issue year2016
Vol264
No1
Pages41-47
Publication size in sheets0.5
Keywords in EnglishEDS, electron tomography, Li ion batteries, silver coating, STEM
DOIDOI:10.1111/jmi.12414
URL http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2818.
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.692 (2) - 2016=2.025 (5)
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