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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Structural properties of alumina-doped lithium borovanadate glasses and glass-ceramics

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Author(s):
Kindle, Michael [1] ; Kmiec, Steven [2] ; Silva, Igor d'Anciaes Almeida [3] ; Eckert, Hellmut [3, 4] ; Martin, Steve W. [2] ; Song, Min-Kyu [1, 5] ; McCloy, John S. [1, 5]
Total Authors: 7
Affiliation:
[1] Washington State Univ, Mat Sci & Engn Program, Pullman, WA 99164 - USA
[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA - USA
[3] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil
[4] Westfalische Wilhelms Univ Munster, Inst Phys Chem, Munster - Germany
[5] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 - USA
Total Affiliations: 5
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 521, OCT 1 2019.
Web of Science Citations: 0
Abstract

This study elucidates the role of Al2O3 in the lithium borovanadate (LBV) system, Li2O-B2O3-V2O5, in improving the glass-forming region of LBV glass. This increased glass-forming tendency is likely due to formation of {[}AlO4](-) units. B-11, Al-27, and V-51 nuclear magnetic resonance measurements suggest an importance of V-O-Al linkages and distribution of Li for charge compensation of {[}AlO4](-) and {[}BO4](-) units. Intense V-51 NMR signals and resolved hyperfine coupling patterns in the electron paramagnetic resonance (EPR) spectra indicate that the majority of vanadium is pentavalent (V5+) and minor amounts of paramagnetic vanadium (V4+) are present. The EPR interaction parameters suggest that the vanadyl-like environments can be described as tetragonally compressed distorted octahedra. Based on V-2p(3/2) X-ray photoelectron spectroscopy, the V4+ concentration is estimated at < 3%. These vanadate glasses are attractive for energy storage applications, as they have higher specific capacities than commercial lithium-ion battery cathodes. (AU)

FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 17/17800-0 - Solid State NMR for the study of structure/property correlations in glassy and glass ceramic materials for energy storage applications
Grantee:Igor D'Anciães Almeida Silva
Support type: Scholarships in Brazil - Post-Doctorate