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Research Article Open access CC BY 4.0

Synthesis and Properties of the LiMn2O4 Cathode Material for Lithium-ion Batteries

Qian Yu, Pinjiang Li, Qian Guo

International Research Journal of Pure and Applied Chemistry · pp. 14–21 · Published 12 Apr 2024

10.9734/irjpac/2024/v25i3852

Abstract

Spinel LiMn2O4 was synthesized by high-temperature solid-state method with lithium salt and manganese salt as raw materials, which were mixing with anhydrous ethanol as solvent under stirring, and calcining at high temperature in in the oxygen atmosphere. X-ray diffraction (XRD) and scanning electron microscope (SEM) showed that the size of lithium manganese particles with spinel structure was 80 to 200 nm, and the particle size distribution was uniform. The results showed that the prepared LiMn2O4 sample sintered at 700°C exhibited superior electrochemical performance when used as a cathode material for lithium-ion batteries with a voltage window of 2.5–4.8 V. The first charge-discharge specific capacity and first discharge capacity can reach 158.0 mAh‧g-1 and 138.4 mAh‧g-1, respectively, at 0.1 A‧g-1 current density, and the first Coulomb retention efficiency is 87.6%. The discharge specific capacity of the LiMn2O4 material can be maintained at 114 mAh‧g-1 when the test current density was returned to 0.1 A‧g-1 after 60 cycles.

High-temperature solid-phase method lithium manganese lithium-ion battery electrochemical performance

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