| Autor: |
Menon, Ashok S., Ogley, Matthew J.W., Genreith-Schriever, Annalena R., Grey, Clare P., Piper, Louis F.J. |
| Zdroj: |
Annual Review of Materials Research; Jul2024, Vol. 54 Issue 1, p199-221, 24p |
| Abstrakt: |
Current high-energy-density Li-ion batteries use stoichiometric Li 3d transition metal oxides as positive electrodes, which are conventionally described purely by transition-metal redox during routine operating windows. Their practical specific capacities (mAh/g) may be increased by widening their operational voltage window, using Li-excess compositions, or a combination of the two, both of which have shown increasing evidence of O participation in the charge-compensation mechanism. Understanding how this influences the electrochemical performance of these cathodes has been of great interest. Therefore, this review summarizes the current understanding of O participation in alkali-ion battery cathode charge compensation. Particular scrutiny is applied to the experimental observations and theoretical models used to explain the consequences of O participation in charge compensation. The charge-compensation mechanism of LiNiO2 is revisited to highlight the role of O hole formation during delithiation and is discussed within the wider context of Li-excess cathodes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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