TY  - JOUR
A1  - Kamel, Mohamed
A1  - Hanna, Abanoub R. N.
A1  - Krellner, Cornelius
A1  - Klingeler, Rüdiger
A1  - Abdellah, Mohamed
A1  - Abdel-Hafiez, Mahmoud
A1  - Hassen, Arafa Sabry Gomaa
A1  - Khalil, Ahmed Saad Gomaa
A1  - Abdel-Baset, Tarob
A1  - Hassan, Abdelwahab
T1  - Synthesis, optical, magnetic and thermodynamic properties of rocksalt Li1.3Nb0.3Mn0.4O2 cathode material for Li-ion batteries
T2  - Crystals
N2  - 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.
KW  - Li-ion batteries
KW  - Li1.3Nb0.3Mn0.4O2
KW  - magnetic susceptibility
KW  - specific heat
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/63356
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-633560
SN  - 2073-4352
N1  - 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).
VL  - 11
IS  - 7, art. 825
SP  - 1
EP  - 12
PB  - MDPI
CY  - Basel
ER  -