Easy and Scalable Syntheses of Li 1.2 Ni 0.2 Mn 0.6 O 2

Pier Paolo Prosini (), Annalisa Aurora, Livia Della Seta and Claudia Paoletti
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Pier Paolo Prosini: ENEA—Research Center Casaccia, Via Anguillarese 301, 00123 Rome, Italy
Annalisa Aurora: ENEA—Research Center Casaccia, Via Anguillarese 301, 00123 Rome, Italy
Livia Della Seta: ENEA—Research Center Casaccia, Via Anguillarese 301, 00123 Rome, Italy
Claudia Paoletti: ENEA—Research Center Casaccia, Via Anguillarese 301, 00123 Rome, Italy

Energies, 2023, vol. 16, issue 22, 1-15

Abstract: Solid-state and sol-gel syntheses were selected as easy and scalable methods to prepare a lithium-rich cathode material for lithium-ion batteries. Among the extended family of layered oxides, Li 1.2 Ni 0.2 Mn 0.6 O 2 was chosen for its low nickel content and the absence of cobalt. Both synthesis methods involved two heating steps at different temperatures, 600 and 900 °C. The first step is needed to decompose the metal acetates, which were selected as precursors, and the second step is needed to crystallise the material. To obtain a material with well-defined defects, the rate of heating and cooling was carefully controlled. The materials were characterised by X-ray diffraction, SEM coupled with EDS analysis, and thermal analysis and were finally tested as cathodes in a lithium semi cell. The solid-state synthesis allowed us to obtain better structural characteristics with respect to the sol-gel one in terms of a well-formed hexagonal layer structure and a reduced Li + /Ni 2+ disorder. On the other hand, the sol-gel method produced a material with a higher specific capacity. The performance of this latter material was then evaluated as a function of the discharge current, highlighting its good rate capabilities.

Keywords: Li-rich compounds; chemical synthesis; electrochemical properties (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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