Zr4+-doped sodium manganese oxide: enhanced electrochemical performance as a cathode in sodium ion batteries.
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| Title: | Zr4+-doped sodium manganese oxide: enhanced electrochemical performance as a cathode in sodium ion batteries. |
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| Authors: | Kashyap, Bristisnata1,2 (AUTHOR), Dutta, Dimple P.1,2 (AUTHOR) dimpled@barc.gov.in, Modak, B.1,2 (AUTHOR), Kumar, Sanjay3 (AUTHOR), Ravuri, Balaji R.4 (AUTHOR) |
| Source: | Dalton Transactions: An International Journal of Inorganic Chemistry. 1/28/2025, Vol. 54 Issue 4, p1476-1485. 10p. |
| Subjects: | Electrochemical electrodes, Structural stability, Sodium ions, Spinel, Cathodes |
| Abstract: | Sodium manganese oxides are regarded as a valuable class of cathode materials for sodium-ion batteries. By varying the stoichiometry of Na, Mn and O, it is possible to obtain layered, tunnel and spinel type structures, which can withstand the electrochemically-triggered sodiation–desodiation process. In this work, we report the electrochemical performance of Na4Mn2O5, a sodium-rich manganese oxide, which has been previously reported to suffer from structural instability due to the Jahn–Teller distortion of the Mn3+ ion. It was observed that the Na4Mn2−xZrxO5 (x = 0.1) cathode delivered a discharge capacity of ∼203 mA h g−1 post 250 cycles with a capacity retention rate of ∼82.8% on doping with Zr4+ ions. The improvement in cycling ability and rate capability is attributed to the enhanced structural stability and improved electronic conduction brought about by the substitution of Mn3+ by Zr4+ in Na4Mn2O5. Density functional theory-based studies were conducted, which adequately support the obtained results. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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