Synthesis, optical, magnetic and thermodynamic properties of rocksalt Li1.3Nb0.3Mn0.4O2 cathode material for Li-ion batteries

  • Since the discovery of the reversible intercalation of lithium-ion materials associated with promising electrochemical properties, lithium-containing materials have attracted attention in the research and development of effective cathode materials for lithium-ion batteries. Despite various studies on synthesis, and electrochemical properties of lithium-based materials, fairly little fundamental optical and thermodynamic studies are available in the literature. Here, we report on the structure, optical, magnetic, and thermodynamic properties of Li-excess disordered rocksalt, Li1.3Nb0.3Mn0.4O2 (LNMO) which was comprehensively studied using powder X-ray diffraction, transient absorption spectroscopy, magnetic susceptibility, and low-temperature heat capacity measurements. Charge carrier dynamics and electron–phonon coupling in LNMO were studied using ultra-fast laser spectroscopy. Magnetic susceptibility and specific heat data are consistent with the onset of long-range antiferromagnetic order at the Néel temperatures of 6.5 (1.5) K. The effective magnetic moment of LNMO is found to be 3.60 μB. The temperature dependence of the inverse magnetic susceptibility follows the Curie–Weiss law in the high-temperature region and shows negative values of the Weiss temperature 52 K (3), confirming the strong AFM interactions.

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Author:Mohamed Kamel, Abanoub R. N. Hanna, Cornelius KrellnerORCiDGND, Rüdiger Klingeler, Mohamed Abdellah, Mahmoud Abdel-Hafiez, Arafa Sabry Gomaa Hassen, Ahmed Saad Gomaa Khalil, Tarob Abdel-Baset, Abdelwahab Hassan
Parent Title (English):Crystals
Place of publication:Basel
Document Type:Article
Date of Publication (online):2021/07/16
Date of first Publication:2021/07/16
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2021/11/09
Tag:Li-ion batteries; Li1.3Nb0.3Mn0.4O2; magnetic susceptibility; specific heat
Issue:7, art. 825
Page Number:12
First Page:1
Last Page:12
The authors acknowledge the financial support (Grant No. 23023) received from Science, Technology and Development Fund (STDF) Egypt (GERF funding program). M.A.-H and R.K. acknowledge the support by the Megagrant by the P220 program of the Government of Russia, project 075-15-2021-604. M.A.-H. acknowledges the financial support from the Swedish Research Council (VR) under project No. 2018-05393. The authors acknowledge the financial support by the Arab-German Young Academy of Sciences and Humanities (AGYA).
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0