Liquid-combustion synthesis of spinel LiMn2O4 cathode material for enhanced electrochemical performance lithium-ion batteries

Abstract

A cubic spinel LiMn₂O₄ cathode material with nanoscale was synthesized via a facile liquid-combustion method at 600, 750 and 850 ℃. The crystal structure and surface morphology of LiMn₂O₄ electrodes have been characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) technique. The samples have an average diameter of 200 nm with an octahedral structure with high crystallinity. Benefiting from the excellent structure, the sample prepared at 750 ℃ delivers the highest first discharge capacity of 115.3 mAh·g⁻¹ with remaining 101.5 mAh·g⁻¹ after 400 cycles at 1 C. Moreover, it exhibits a good cycling performance at 55 ℃, still had the capacity of 105.4 mAh·g⁻¹ with a capacity retention of 71.2% following 282 cycles. The facilely synthesized octahedral LiMn₂O₄ provides a practical application strategy for lithium-ion batteries.

KEY WORDS: Spinel LiMn₂O₄, Liquid-combustion method, Lithium-ion batteries

Bull. Chem. Soc. Ethiop. 2024, 38(5), 1429-1437.                                                         

DOI: https://dx.doi.org/10.4314/bcse.v38i5.18