| Full text | |
| 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 Opportunities: | 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |