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Subject: search.filters.subject.Coulombic efficiency

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    Item type:Publication,
    Improved Na+ ion storage capacity of Na2O-Bi2O3 glass anode network: effect of TiO2 nanocrystals
    (2022-01-01)
    Yerranuka, Saritha Kumari
    ;
    Katta, Vamsi Krishna
    ;
    Mekprasart, Wanichaya
    ;
    Pecharapa, Wisanu
    ;
    Dutta, Dimple P.
    This investigation highlights the influence of nanosized amorphous intermediate domains such as Na<inf>3</inf>Bi and Na<inf>2</inf>Ti on the electrochemical characteristics of the new Na<inf>2</inf>O-Bi<inf>2</inf>O<inf>3</inf> glass anode network mixed with TiO<inf>2</inf> nanocrystals. Amorphous domains (h-Na<inf>3</inf>Bi and h-Na<inf>2</inf>Ti) 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 R<inf>ct</inf> 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.