| Autor: |
Palluzzi, Matteo, Silvestri, Laura, Celeste, Arcangelo, Tuccillo, Mariarosaria, Latini, Alessandro, Brutti, Sergio |
| Předmět: |
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| Zdroj: |
Crystals (2073-4352); Jul2022, Vol. 12 Issue 7, pN.PAG-N.PAG, 15p |
| Abstrakt: |
In this manuscript, we report an extensive study of the physico-chemical properties of different samples of O3-NaMnO2, synthesized by sol–gel and solid state methods. In order to successfully synthesize the materials by sol–gel methods a rigorous control of the synthesis condition has been optimized. The electrochemical performances of the materials as positive electrodes in aprotic sodium-ion batteries have been demonstrated. The effects of different synthesis methods on both structural and electrochemical features of O3-NaMnO 2 have been studied to shed light on the interplay between structure and performance. Noticeably, we obtained a material capable of attaining a reversible capacity exceeding 180 mAhg − 1 at 10 mAg − 1 with a capacity retention >70% after 20 cycles. The capacity fading mechanism and the structural evolution of O3-NaMnO 2 upon cycling have been extensively studied by performing post-mortem analysis using XRD and Raman spectroscopy. Apparently, the loss of reversible capacity upon cycling originates from irreversible structural degradations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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