Improved electrochemical performance of surface-modified lithium-rich layered oxide electrodes with indium tin oxide (ITO) coating by magnetron sputtering.
In: Ionics, Jg. 29 (2023-08-01), Heft 8, S. 3027-3038
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Zugriff:
In this study, indium tin oxide (ITO) has been used for the first time in the surface modification of lithium-rich manganese-based cathode materials by magnetron sputtering to improve their electrical conductivity and electrochemical performance. The Li-rich Mn-based material (Li 1.32 Ni 0.24 Mn 0.56 O 2 ) before and after the modification is examined by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and transmission electron microscope (TEM). Furthermore, the electrochemical properties of the electrodes before and after modification are investigated using constant current charge/discharge, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) test methods. The results revealed that the ITO-coated Li 1.32 Mn 0.56 Ni 0.24 O 2 (LMN@ITO) electrode performs the best electrochemical performance. The highest discharge capacity (223.53 mAh/g) and the best retention rate (98.39%) are obtained after 100 cycles for the coin-cell using the LMN@ITO cathode electrode under a current density of 0.5 C. However, the discharge-specific capacities and cyclic retention rate of the uncoated samples are evaluated at 206.86 mAh/g and 95.81%, respectively. The performance improvement is attributed due to the ITO surface modification, which reduces the Mn dissolution and decreases the interfacial charge transfer resistance. [ABSTRACT FROM AUTHOR]
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Titel: |
Improved electrochemical performance of surface-modified lithium-rich layered oxide electrodes with indium tin oxide (ITO) coating by magnetron sputtering.
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Autor/in / Beteiligte Person: | Wen, Meng ; Qing, Xiaofei ; Zhong, Shengwen ; Mahmoodi, Soroosh |
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Zeitschrift: | Ionics, Jg. 29 (2023-08-01), Heft 8, S. 3027-3038 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0947-7047 (print) |
DOI: | 10.1007/s11581-023-05064-1 |
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