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Improved Na+ ion storage capacity of Na2O-Bi2O3 glass anode network: effect of TiO2 nanocrystals
Author(s)
Yerranuka, Saritha Kumari
Katta, Vamsi Krishna
Dutta, Dimple P.
Ravuri, Balaji Rao
Date Issued
January 1, 2022
Type
Article
Abstract
This investigation highlights the influence of nanosized amorphous intermediate domains such as Na3Bi and Na2Ti on the electrochemical characteristics of the new Na2O-Bi2O3 glass anode network mixed with TiO2 nanocrystals. Amorphous domains (h-Na3Bi and h-Na2Ti) are indexed with hexagonal structures precipitated during the charging and discharging process, which might improve the high electrochemical performance of the glass anode network to a greater extent. The first discharge and charge capacities are recorded as 700 and 1060 mAh/g, respectively. Moreover, the Coulombic efficiency achieved is between 66 and 98% as the current rate varies from 0.1 C to 5 C. The value of Rct in the EIS spectra gradually decreases up to 500 cycles, indicating an increase in the electronic conductivity, eventually boosting the ionic conductivity. These results will create a potential interest to design and develop various glass and glass–ceramic anode networks to realize Na-ion technology for large-scale energy storage applications.
Citation
Ionics, 28(1), 307-315, 2022