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Carbon coated NaLi0.2Mn0.8O2 as a superb cathode material for sodium ion batteries

Quyen, N.Q. and Van Nguyen, T. and Thang, H.H. and Thao, P.M. and Van Nghia, N. (2021) Carbon coated NaLi0.2Mn0.8O2 as a superb cathode material for sodium ion batteries. Journal of Alloys and Compounds, 866: 158950. ISSN 9258388

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Abstract

P2 structure materials have been known as a promising cathode material for sodium ion battery. However, their substandard rate capability is a major obstacle for the application of sodium ion batteries to overcome. Herein, we improved the rate capacity of the P2-type sodium-lithium-manganese oxide material by a carbon additive on the material surface. The structure and morphology of pristine sodium-lithium-manganese oxide (NLM) and carbon-coated sodium-lithium-manganese oxide (NLM@C) were confirmed by X-ray diffraction (XRD), Raman spectra, thermal gravimetric analysis (TGA), scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS), and transmission electron microscopy (TEM). The electrochemical results revealed that the carbon coating improves rate capability of NLM@C material and increases its specific capacity. Specifically, the NLM@C material delivered a specific capacity of 160 mAh g−1 at 0.1 C, ca. 33% higher than that of pristine NLM material; the NLM@C material retained a capacity of 115 mAh g−1 at a high charged/discharged rate of 1 C. The result suggests that NLM@C material is a promising cathode material for sodium-ion battery applications. © 2021 Elsevier B.V.

Item Type: Article
Divisions: Faculties > Faculty of Physical and Chemical Engineering
Identification Number: 10.1016/j.jallcom.2021.158950
Uncontrolled Keywords: Cathode materials; Cathodes; Energy dispersive spectroscopy; Gravimetric analysis; High resolution transmission electron microscopy; Image denoising; Lithium compounds; Lithium metallography; Lithium-ion batteries; Manganese metallography; Manganese oxide; Metal ions; Morphology; Oxides; Scanning electron microscopy; Sodium compounds; Sodium metallography; Thermogravimetric analysis; Energy dispersive X ray spectroscopy; Lithium manganese oxide; Material surface; Rate capabilities; Specific capacities; Structure and morphology; Structure materials; Thermal gravimetric analyses (TGA); Sodium-ion batteries
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/8622

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